Very low GSM signal on my Xperia Z2 - Xperia Z2 Q&A, Help & Troubleshooting

Hey XDA!
I got a big problem. I searched whole Google for troubleshooting this, but didn't found anything that would help me.
I bought on cheap price my Xperia Z2 phone. It's without warranty, so I cannot send it to repair under warranty. When I turned it on, I realised that signal is so low. As if this wasn’t bad enough, GSM antenna (with LTE support) is 50 meters outside my house and I can see it (it's not covered by buildings), so it should have full signal all the time. But it have 2 lines, 4 lines, or no signal... When I go to school, I have no signal. When I enter some shop or building, I have no signal. I can't call when i'm in building, or when i'm lucky and someone will answer, he will not hear me and after 5-10 seconds phone disconnects from GSM and shows me no signal. It's frustrating. I tried 3 another operators sim cards, and everywhere it's the same problem. I bought new GSM antenna and replaced it, but it didn't help. I tried Android 4.4.2, Android 5.1, but the same problem. I think it's hardware problem, but where because i replaced GSM antenna, so what to replace next?
Argh, I should buy verified by myself Nexus 5...

Do you use any phone case?

Mikey94 said:
Do you use any phone case?
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Nope.

Related

[Q] Losing signal on my Amaze 4G

Okay, here is my problem: Every once in a while I will completely lose all signal on my phone. It wont pick up 2G, 4G, nothing. Wifi and bluetooth both seem to work though just fine. I've searched and haven't found anyone with the same issues so I'm wondering if it's just my phone or if nobody has commented on it. I first noticed this about two weeks ago, when my phone refused to find service. I was stuck with the little X next to the signal meter. I figured I was just in an area with poor service and didn't think much of it. An hour later, still, no service. This time I went outside where I know I have good 4G service and nothing for 5 minutes. I enabled airplane mode and disabled it, still nothing. Turned the phone off and back on as a last resort. Still nothing. I ended up finishing the day with wifi calling as that still worked. Sometime later my phone began receiving service again so I thought it was a fluke issue.
Then, just yesterday the same thing happened. This was when I rebooted my phone (which bypasses the fastboot feature) and service was restored right away. I called T-mobile and they said there weren't any network issues in my area and they had never heard of this issue before on the Amaze.
So, this is where I'm asking if anyone has heard of this before. I'm running a stock ROM and it hasn't been rooted. Thanks for any comments!
This might help just a touch. I do live in an area with decent service but my couch and bedroom are deadzones for some odd reason. I bought these signal boosters for 2 bucks figuring "what the hell, I'll give it a shot". No more dead zones, and data went from E to G. Not a miracle worker but for a couple bucks it keeps a signal at least.
http://www.amazon.com/gp/aw/d/B004KMK018/ref=mp_s_a_1?qid=1328921838&sr=8-1
Sent from my T-Mobile myTouch 3G Slide using Tapatalk
Wireless Coverage
I have 2 brand new Amaze 4G for a few months now and had no problem with the coverage. I know the coverage is good with full signal bars and have not found any issue with coverage.
Sometimes, different phones have different received signal sensitivity. Also depends on user behavior. If you are always using a handsfree device (cable or BT) and your phone is in a bag, then your coverage is reduced by your action. The best coverage you can ever get is when you have line of sight (unobstructed) to the cell towers.
There are a few issues with your problem:
1-Poor inbuilding coverage
2-Poor coverage in your area
3-Network optimization issue
4-Hardware issue
If you are going from 1 bar to no bar, then most likely you have coverage issue. You lost signal since the level is already very low.
If you are going from full bar to no bar, you might have hardware or network optimization issue. Try your phone is the city or area with known good coverage first. If the behavior persists, then you have phone problem.
I used to manage wireless network for carriers.
same issue
I've had the exact same thing happen to me. Red x, no signal except wifi, in places where signal is not normally an issue. Battery pull doesn't work, return to signal seems arbitrary. Had the same thing happen with my Desire. I have no answers, but you are not alone.
Yup, it happened with my first Amaze. I got it back in January and started playing with it - rooting, custom ROMs, etc. Then later that day, the signal just died on me. I thought I must've screwed something up, so I flashed back to everything stock. No luck. I waited for half a day, then it randomly started working again at night.
You probably noticed tha tI said that happened with my first amaze. That's because after that signal issue, I discovered that my camera stopped working. I returned it to T-Mobile and they sent me another one. This one is working great though.
Well thank you for all the input so far. Id like to say that this isn't my first cell phone and I'm not new to weak or poor signal areas, especially from T-mobile. I was using my phone at work at the time, which has anywhere from no signal to 3 bars depending on where you are. This wasn't one of the cases that I was standing in a dead zone when I checked my phone. I had no signal for several hours, including over 30 minutes of standing outside trying everything I could think of. I have had excellent signal outside in the past, exactly where I was "Hiding". I got the Amaze because I was tired of playing with my old HD2 and having to work around bugs and possibly not receiving calls. So far, I'm not happy that the radio seems to quit responding all together and leaves me without a phone (minus the wifi calling but I'm not always around a hotspot).
I also experienced a dramatic signal loss at home, going from full signal strength to maybe one bar right around the time that I first had issues. I don't know if this is related or if this is a completely different thing.
I am 99% sure this is an error with the phone - probably software related with the radio driver(s) or radio firmware. I guess I will try taking it back to T-mobile and seeing if they could exchange it for a new one. I was just really wanting to avoid that as I finally got my phone setup how I like it. Again, Thank you for the input and let me know if you are having the same problem or if you know of a solution.
I am on my third Amaze and also tried a Galaxy SII X due to the same problem at my home. Even the Samsung did the same thing. In my house and especially in the driveway, the signal varies wildly between -85dbm to as low as -111dbm. The frustrating thing is once it loses the signal, it doesn't seem to reacquire it without a reboot.
I'm with Telus, and they said they will check on it, but I'm not holding my breath. In my immediate area, outside my house, the signal isn't great, but it will usually hang on. I have been to different cities, and all has been well with it. Coming from a rock steady 2G Touch Pro II, I am disappointed as well..
I am new here to this site, but I am having a similar problem with my Amaze. At work I always have a weak 4G signal, but the last few days it has been gone altogether. I have full phone service (4 bars) but no data. The 4G indicates I have signal, but I can't connect to anything on the web. I called HTC and they had me pull my battery and sim card so they could send a "reset signal" to my phone. After my phone came back up I had faster service than ever, but it only lasted a few minutes and went away again. I am thinking this is a phone issue. Oh, the Amaze is my first Android. My only previous smartphone was my Nokia E71x.
I know if I have WiFi calling selected, an x will show up on my signal if i turn WiFi on. I've personally only had slow data in the area I work. I blame it on the fact that it is a busy corporate park with lots of hotels, cuz my signal is fine elsewhere. Try calling tmobile and seeing if they have known tower issues in your area. I know I had that problem with sprint and they sent me a free airave. Maybe tmobile could do something similar if its.a known problem.
Sent from my HTC_Amaze_4G using XDA App
It's most likely a network issue. I get the same thing, it will timeout/refresh the network where it will not get a signal for about 30 seconds a few times per day. I blame the network, since the same thing happened to me with my mt4g
Sent from my Energized HTC Amaze 4G using xda-premium
Jessfox said:
I know if I have WiFi calling selected, an x will show up on my signal if i turn WiFi on. I've personally only had slow data in the area I work. I blame it on the fact that it is a busy corporate park with lots of hotels, cuz my signal is fine elsewhere. Try calling tmobile and seeing if they have known tower issues in your area. I know I had that problem with sprint and they sent me a free airave. Maybe tmobile could do something similar if its.a known problem.
Sent from my HTC_Amaze_4G using XDA App
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Thank you! This fixed it for me. It was happening only today while I had WiFi enabled, it would turn the mobile radio off completely and the box would be grayed out so I was unable to turn it back on. I had my sim updated today to enable wifi calling so after I read your post, I turned the wifi calling off and the mobile radio signal came back immediately. Strange bug.
eirb said:
Thank you! This fixed it for me. It was happening only today while I had WiFi enabled, it would turn the mobile radio off completely and the box would be grayed out so I was unable to turn it back on. I had my sim updated today to enable wifi calling so after I read your post, I turned the wifi calling off and the mobile radio signal came back immediately. Strange bug.
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I was told It's by design. It saved battery life by not constantly searching for a mobile network it won't use (due to wifi calling). It's not like you can hand off the call to the local network. I do notice that if i start walking outside, once my wifi hits a low signal it logs back on the network.
djdanska said:
I was told It's by design. It saved battery life by not constantly searching for a mobile network it won't use (due to wifi calling). It's not like you can hand off the call to the local network. I do notice that if i start walking outside, once my wifi hits a low signal it logs back on the network.
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Click to collapse
There is actually an option to specify how the WIFI calling works: either all the time or only when cellular signal is gone. Sounds like you have it set to be on all the time. This means that if you have a good WIFI connection, the cellular radio is shut off and all traffic goes through the WIFI calling app. The other option (which I use) only uses wifi calling when there is no cellular signal.
I have lost cellular signal 3 additional times since my last post. Its not just that I'm in a bad spot and I have no signal for 30 seconds. This goes on for 30 minutes or more - up to several hours. I have found that rebooting the phone fixes it as I believe it completely (as much as possible) removes power from the radio and requires it to be completely re-initiated during the reboot. Simply shutting it off doesn't work as the quickboot is enabled and most likely doesn't perform a complete re-initialization of the radio. My only guess at this point is that there is some kind of possible leftover code from development which never was removed from the radio (this happens more times than not). It could be a timeout or simply causing the radio to hang because of 1. excessive heat generation, 2. excessive power drain, 3. buffer overflow, 4. excessive RF transmit power... In any case, one of those issues could trigger an event in the radio to cause it to simply stop responding.
I am in the process of trying to get T-Mobile to get me a new phone as I am outside of the 30-day window. I have also confirmed it with them that this was not a tower issue.
Thanks
htc amaze 4g signal issue
hay dear i've also the same problem .. i've just bought a new htc amaze 4g having full warranty and signals goes zero everytime when i m in my room ... dnt know whats the problem... is this problem also in the brand new sets..???
Salar khan said:
hay dear i've also the same problem .. i've just bought a new htc amaze 4g having full warranty and signals goes zero everytime when i m in my room ... dnt know whats the problem... is this problem also in the brand new sets..???
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Hmmmm who is dear? Lol.... Ne ways, well first off, I commend you for digging this thread up rather than just starting a new thread without even looking first :thumbup::thumbup::thumbup: I can't say I've ever seen someone who hasn't even been a member for 1 full day do that. Shoot, I see senior members start new threads or pointless threads without searching first, so good job haha.
Ok, back on topic now, if it's only dropping when you go in your room, then I don't think it's anything wrong with the phone. Not sure who your provider is, but u may be able to call them and have them look up your address and tell you what kind of signal u should get outside your house, and what to expect inside your house. I know t-mobile does at least
sent from my
NRGized amaze
powered by Faux
Has anyone found a solid solution for this? I was able to pick up a amaze for 50 bucks off of craigslist. But I can't get it to connect to mobile net work. A T-Mobile employee told me to root it, but I'm trying not to cause it's not for me.
Sent from my HTC Sensation using xda app-developers app
crewdawg said:
Has anyone found a solid solution for this? I was able to pick up a amaze for 50 bucks off of craigslist. But I can't get it to connect to mobile net work. A T-Mobile employee told me to root it, but I'm trying not to cause it's not for me.
Sent from my HTC Sensation using xda app-developers app
Click to expand...
Click to collapse
Well your situation is a little different than other peoples in this thread if u can't connect al all. Ok wait so first off, it won't connect to a network at all? AND you only paid 50 bucks for it...? Sounds a little fishy to me bud, why did he say he was selling it...?
Next thing, I don't know why a t-mo rep would tell you to root the phone, rooting has no effect on your signal strength or your ability to connect to a network.
And lastly, is the phone a T-Mobile branded amaze owhat carrierr...? and will it not connect at all, period, or can u make calls just not data...?
sent from my
NRGized amaze
powered by Faux
It's a known bug in our phone
Just wipe cash & dalvic cash
Even more convenient should be with this:
https://play.google.com/store/apps/details?id=ext.recovery.control
jauhien said:
Just wipe cash & dalvic cash
Even more convenient should be with this:
https://play.google.com/store/apps/details?id=ext.recovery.control
Click to expand...
Click to collapse
And that's supposed to do what for your signal?
sent from my
NRGized amaze
powered by Faux
aj_2423 said:
And that's supposed to do what for your signal?
sent from my
NRGized amaze
powered by Faux
Click to expand...
Click to collapse
The phone simply begins connecting normally.. nothing extraordinary though..
---------- Post added at 01:05 PM ---------- Previous post was at 12:27 PM ----------
If the normal connection won't restore after the wiping cash & dalvik cash, you probably have to consider this awesome app:
Moderator Edit
Link removed because you can't post direct links to paid apps
Thank you.
Here is the link to the free version of what actually needed though:
https://play.google.com/store/apps/details?id=net.igio90.androidtweaker.free

Mobile network signal issue

So almost after 3 weeks of getting the TS I decided to put in my AT&T SIM. I was reluctant to use that tiny bastard screw driver but I did it anyways. I have noticed that the network signal strength of my watch is almost non-existant. It will get cellphone signal at only certain place. With the same sim card on my phone (Nexus 5), I get good cell reception.
How are others doing in this department? How's the cellphone signal? Is there anything I can do to improve the mobile network signal. Currently I am on stock with Loki's security patch.
I am not sure if this is a hardware issue or software issue. I remember someone opening the TS and checking the antenna. Any suggestions would be highly appreciated.
Some information on my TS -
North American 1/8
Stock ROM with Loki's patch.
Ok here is my observation:
I could not get signal inside my office, home and costco
I did get signal once I get out of my office - full signal bars with H+. I made a short trip from office to costco and home and back to office. It was able to get signals when I was driving but in some areas where I used to get 2-3 bars in my phone, TS did not pick at any signal at all. So mobile network signal is working but it is pretty weak compared to my phone.
May be it needs some tune up 
i have the same problem,the signal is low and TS really has a hard time to find one,if its lost
can we do something about this ?
I opened mine just to have a look and found one of the connectors lose, took a bit of fiddling to get it back on but my network signal seems as good as my note3.
I don't know why, but after installing this app.https://play.google.com/store/apps/details?id=com.misonicon.signalbooster3g4g
The signal works perfectly, I didn't believe in this apps but now I don't know what to say
At least it works
Mobile frequency fluctuates on my end too, made sure APN settings are listed exactly like they say here on the forums, maybe I should change to another GSM 3G SIM card?

Cell connectivity completely drops, then comes back, rinse and repeat

I received my new XA Ultra from Amazon yesterday. Popped in my SIM and started setting it up. It had two software updates out of the box, so I applied them, then started installing apps. I noticed that my cell connectivity would completely drop (no bars), then come back. When I checked in the Access Point settings, the option to discover carriers would appear, then disappear.
I assumed it was some kind of software corruption, so I factory reset, but it continued doing it. I also tried pulling the sim out and putting it back in several times. I can only assume that I somehow got a defective unit or that one of the software updates applied the radio incorrectly. I processed a return with Amazon and have a replacement coming later this week.
I hope Amazon doesn't turn around and resell it through warehouse deals. I have received a few devices from them that they clearly didn't test and I was very explicit in my comments for the return. I'm just hoping that my replacement doesn't exhibit the same issues because I'm not sure what else it could be. It's not my SIM. All of my other phones stay connected to AT&T just fine in the same spot.
greyhulk said:
I received my new XA Ultra from Amazon yesterday. Popped in my SIM and started setting it up. It had two software updates out of the box, so I applied them, then started installing apps. I noticed that my cell connectivity would completely drop (no bars), then come back. When I checked in the Access Point settings, the option to discover carriers would appear, then disappear.
I assumed it was some kind of software corruption, so I factory reset, but it continued doing it. I also tried pulling the sim out and putting it back in several times. I can only assume that I somehow got a defective unit or that one of the software updates applied the radio incorrectly. I processed a return with Amazon and have a replacement coming later this week.
I hope Amazon doesn't turn around and resell it through warehouse deals. I have received a few devices from them that they clearly didn't test and I was very explicit in my comments for the return. I'm just hoping that my replacement doesn't exhibit the same issues because I'm not sure what else it could be. It's not my SIM. All of my other phones stay connected to AT&T just fine in the same spot.
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Did you check before purchasing that it would connect to I'm guessing by AT&T US network's I know yours are different to ours in the UK. I've not had any problems with my normal xa but I'm in the UK
Sent from my Xperia XA using XDA Labs
aidy.lucas said:
Did you check before purchasing that it would connect to I'm guessing by AT&T US network's I know yours are different to ours in the UK. I've not had any problems with my normal xa but I'm in the UK
Sent from my Xperia XA using XDA Labs
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Click to collapse
It's definitely fully compatible. It even downloads the correct APNs, but then they just disappear and the signal drops completely. I get full LTE speeds when it's working and nothing when it's not. I also tested a T-Mobile SIM and, while it holds onto the signal longer, it does the same thing (drops completely).
I plugged the phone into a computer and did a complete software restore, which didn't fix the issue. At this point, I'm sure it's either hardware or a really bad ROM update. I'm hoping it's hardware, because if not, that means that the replacement will have the same issue after applying the software updates to it.
This is my second Sony xa ultra with the same issue here's what happened
Purchases from best buy didn't setup until I got home had 2 update applied them signal drop and reset constantly I figured it was because I have bad reception in my area but the more I looked at the phone I noticed the build quality on the metal bumper wasn't sealed in some areas so I grabbed the packaging and headed back to Best Buy keeping note of the signal issues as I drove there (disconnected from WiFi of course) I noticed the signal did not drop connection at all on the way to Best Buy return the phone and explain to him the issues that I had at home with the signal and also wasn't happy with the build quality defect so I returned it and exchange for another one immediately popped the Sim in it downloaded my APN and I had LTE drove home no drop issues connected to wifi installed the two updates then I drop issue return
630travon said:
This is my second Sony xa ultra with the same issue here's what happened
Purchases from best buy didn't setup until I got home had 2 update applied them signal drop and reset constantly I figured it was because I have bad reception in my area but the more I looked at the phone I noticed the build quality on the metal bumper wasn't sealed in some areas so I grabbed the packaging and headed back to Best Buy keeping note of the signal issues as I drove there (disconnected from WiFi of course) I noticed the signal did not drop connection at all on the way to Best Buy return the phone and explain to him the issues that I had at home with the signal and also wasn't happy with the build quality defect so I returned it and exchange for another one immediately popped the Sim in it downloaded my APN and I had LTE drove home no drop issues connected to wifi installed the two updates then I drop issue return
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Click to collapse
The replacement model I received from Amazon did it as well. Right out of the box, before updates, it was dropping the signal. Are you on AT&T?
I watched it really closely. I think I know what's happening. It's not falling back to HSPA. When the LTE is too weak, it simply drops completely until it can reconnect to LTE. If you set it to HSPA only in the mobile networks menu, you will never lose your signal. I tested it with both T-Mobile and AT&T with the same results.
This is a pretty major defect.
You might be on to something, yes I'm also on AT&T.. but I can't find HSPA in mobile network should it be GSM only or LTE (preferred)
630travon said:
You might be on to something, yes I'm also on AT&T.. but I can't find HSPA in mobile network should it be GSM only or LTE (preferred)
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Click to collapse
It should be something like "GSM/WCDMA Auto" or "WCDMA only". Basically anything without LTE (except CDMA).
I'm honestly just glad to finally have someone else confirm. The chances of having two defective units in a row are extremely slim. Really liked the device otherwise, too, especially for the price.
I tested it for hours. I never got a disconnect on HSPA when I had that set. I just wasn't willing to live with that restriction.
Me as well!! phone is perfect for the price I paid out of pocket I had a BB gift card. I've been shopping for the right phone for a month now I've had about 5 phone from 700 to 200 bucks the expensive ones we're worth the price and the cheaper ones didn't feed my power craving I'm pretty happy with this one for the moment, thanks for the tip
This may be an AT&T SIM related issue.
I have T-Mobile and with my T-Mobile SIM I have no problems. I tried my friend's AT&T SIM, downloaded the APN, rebooted, and sure enough signal drops just like you're experiencing.
I'm having the same exact issue as previous posts with my Ultra. I purchased the unit from best buy the day it came out and using it on AT&T. I love the phone but the issue with completely losing connectivity is a bit annoying. Called customer service and they gave me the same website to fix software issues. Just curious as to why I'll be in same location without movement and then all of a sudden lose my signal.
I have the same problem using cricket wireless which is using att's network, lte signal comes and goes, this is becoming really annoying, is there a fix for this already, or should i return the phone
So I just got off the phone with Sony and they said I would have to send in the phone for repair leaving me with no phone. I've had issues before with phones and the companies just send you a new unit with a box and return label to send back defective unit. The rep said maybe my provider would give me a loaner phone.... Smh Looks like it might be time to leave Sony. Maybe I'll have better luck with the Lenovo Phab Pro 2 coming out next month.
Same issue here, right out of the box today.... Using AT&T reseller and I would have to agree that it is an issue as was mentioned earlier where the phone is somehow not able to fall back on to HSPA on a weak LTE connection so it just completely disconnects. Strange thing is where I am using it (at my desk in my office) I never had an issue of LTE dropping off with other brands of phones. As soon as I left the cell area and started using it at home or at another location further away I had no dropped LTE signals. I think Sony support will be useless unless we can somehow get past the standard support desk. They told me they have no higher support I can be directed to, that I would either just do a software repair (which I assumed correctly would not work) or send it in to service. Not sure what I am going to do at this point, cannot have my phone jumping out of service every 2 minutes during the work day. Any other suggestions would be appreciated.
EDIT: upon further review (using LTE discovery App) it appears that "some" At&t sites are having issues staying connected with LTE band 17 on this phone. I drove up to one of the sites the phone has issues with. It had a solid,strong signal within 1 block of the tower and band 17 still disconnected the radio completely. As soon as it reset and moved to band 4 it stayed on without disconnecting until I moved away from the site far enough for band 17 to kick back in. At that point it continued to disconnect every 1 -2 minutes until I moved the phone mode into HSPA preferred. I don't know what to say about this, band 17 works great on 2 towers within 10 miles of here, but some others and this tower causes the phone to go into a fit. Clearly the phone has LTE issues as any other ATT LTE phone on band 17 I have used in this area has always worked just fine. Anybody have an opinion on this???
I have what I think is the issue, now if we have any way to get this information to anyone who can actually do something about it. I have 2 sites by my home that the phone works flawlessly on LTE... no dropped LTE signal whatsoever. Here is the difference... they are band 17 ONLY sites where the sites my phone is unable to hold a LTE signal when the At&T site is broadcasting both band 4 and 17. That would explain why the rest of the sites around where I work do not maintain a signal either. We need to all contact Sony support and somehow get this information thru to them. The issue is the phone clearly being unable to handle a site broadcasting 4 and 17 which I think is a majority of them.
napali said:
I have what I think is the issue, now if we have any way to get this information to anyone who can actually do something about it. I have 2 sites by my home that the phone works flawlessly on LTE... no dropped LTE signal whatsoever. Here is the difference... they are band 17 ONLY sites where the sites my phone is unable to hold a LTE signal on are both band 4 and 17. That would explain why the rest of the sites around where I work do not maintain a signal either. We need to all contact Sony support and somehow get this information thru to them. The issue is the phone clearly being unable to handle a site broadcasting 4 and 17 which I think is a majority of them.
Click to expand...
Click to collapse
It's still not falling back in HSPA like it should. If it has difficulty with an LTE connection, it should not drop connectivity completely.
Sent from my SAMSUNG-SM-N930A using Tapatalk
greyhulk said:
It's still not falling back in HSPA like it should. If it has difficulty with an LTE connection, it should not drop connectivity completely.
Agreed, but keep in mind that my XE ultra was 1 block from the tower with incredible LTE signal strength and it still completely shut the radio down and restarted. This is not for lack of signal but a complete inability for it to handle a band 17,4 tower. Although it would be great if it just moved into HSPA, that would mean your phone would be in HSPA 80% of the time, even when the LTE signal was completely adequate for the area. This clearly is a defect that makes the phone basically unusable (as it continually shuts the radio on and off) until Sony can figure this out. My concern... there is no way to talk to anyone at Sony that can do anything about this until they get enough support complaints directly related to this issue, this could take months not including the time they need to program an update and fix. Very frustrating.
Click to expand...
Click to collapse
Frustrated with this as well, hopefully sony fixes this problem more sooner than later
Received an update yesterday and I can't confirm 100% but it appears I haven't had as bad connection (popping in and out). I'm in Houston btw.
I got the update and so far phone has been working fine
The latest updates from sony fixed this issue.. so happy and enjoying it now

Regarding low network signal (possible solution?)

I've been using this phone for the past few days, and I noticed that the network signal is really low and non existent in closed environments.
Today, I noticed this YT video https://www.youtube.com/watch?v=e-QRcGrUK8M that explains how to change the network antenna.
And in the comments I noticed these comments that maybe it's not a non-functional antenna, it could be that one of the connectors are loosened.
The phone is still under warranty so I won't **** with it, and it isn't mine. If someone tries it, it would be nice to post it here because there are a lot of people with that phone that have that problem.
Did you check if the Signal Antenna cable was connected well? Problem might be that. And if the cable was connected well but it still can not work as before, the connetor might be damaged. you can replace it with a new one. hope this can help you. 
Click to expand...
Click to collapse
I've opened my phone again, and noticed one of the connectors had loosened. Connected it back to the motherboard, and started up. Phone instantly had network signal again . Thanks for the response, and thank you for the great tutorials! Upvoted them! ^^
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Click to collapse
There is nothing such as loose connectivity. Either it's plugged or not. Switch to other modes, 3G, 2G and see if it is the same
DavidMKD said:
There is nothing such as loose connectivity. Either it's plugged or not. Switch to other modes, 3G, 2G and see if it is the same
Click to expand...
Click to collapse
Поздрављам комшију
Selecting 4G/3G or 2G didn't solve anything.
That seemed to solve problems to a lot of people.
For the past 3 days, I had half to full signal and I was satisfied with it totally, and suddenly it dropped to zero and lost it. I was furious, wasn't sure anymore was it HW or SW related. And I did some search through forums and I saw somewhere that reflashing the modem or baseband via Flashtool can be good.(I found a thread where people selected USA band and lost signal). And I thought to give a try.
When I restarted it, for few seconds it was blank and it went full bars. I was happy af
So reflashing the modem file that comes with the firmware can make solve it (at least in my case)
Now after 3 days, the problem returned. No signal again, so I'll have to flash it again

Question Has anyone else been noticing very poor signal quality?

Been noticing that my signal drops more than normal at home and at work since swithching to the xperia, Used to have both a Note10+5g which would get consitant 5g at full signal, and the same for my Oneplus 9Pro, But with the xperia ill get 1-2bars 5g in the same room if it hasnt dropped to 4G at 2 bar or 3G. Mobile network EE
{Moderator Announcement: Thread title edited due to language. - Oswald Boelcke, Moderator}
Just switched from OP10 Pro to Sony and I noticed this same thing. With my OP10 Pro I usually got very good signal, but with Xperia the signal is very poor.
Me as well, especially on WiFi. My router supports only WiFi 4 and I get poor signal if not directly next to the router.
bobstar3233 said:
Been noticing that my signal drops more than normal at home and at work since swithching to the xperia, Used to have both a Note10+5g which would get consitant 5g at full signal, and the same for my Oneplus 9Pro, But with the xperia ill get 1-2bars 5g in the same room if it hasnt dropped to 4G at 2 bar or 3G. Mobile network EE
{Moderator Announcement: Thread title edited due to language. - Oswald Boelcke, Moderator}
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I switched from Nothing Phone 1 to Sony and I noticed this same thing. With my NP1 I usually had a very excellent signal,
Okay glad it's not just me, but I wonder why it's like that now
Phew, I am not alone. Mine works poorly with Wifi 6. Any ideas to fix?
I've noticed this also, and the Bluetooth connection (with Sony's WH-1000XM4 and WF-1000XM3) is also very weak.
ov_darkness said:
I've noticed this also, and the Bluetooth connection (with Sony's WH-1000XM4 and WF-1000XM3) is also very weak.
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I have noticed this bluetooth issue only when screen is Off? How about you?
I'm also switching from xperia 1 to 1 IV and bought a metal frame case for the phone with a lower signal, the signal has dropped even more I don't use a case anymore
Unfortunately, the GPS signal is weak a lot of times and stops navigating.
XmlNode said:
Unfortunately, the GPS signal is weak a lot of times and stops navigating.
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Will this signal issue be fixed with an upgrade?
I do hope that Sony will fix these soon.
Signals should not be an issue in 2022. However, be aware that the GPS is only a single-band one, despite some specs around the net.
bobstar3233 said:
Been noticing that my signal drops more than normal at home and at work since swithching to the xperia, Used to have both a Note10+5g which would get consitant 5g at full signal, and the same for my Oneplus 9Pro, But with the xperia ill get 1-2bars 5g in the same room if it hasnt dropped to 4G at 2 bar or 3G. Mobile network EE
{Moderator Announcement: Thread title edited due to language. - Oswald Boelcke, Moderator}
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Hi, I just realized the solution.
Please install voWIFI app via play store, disable DSDS, and you are done!
If you totally missed your Antenna, be sure that u are using the first sim slot for your sim card
afshineb said:
Hi, I just realized the solution.
Please install voWIFI app via play store, disable DSDS, and you are done!
If you totally missed your Antenna, be sure that u are using the first sim slot for your sim card
Click to expand...
Click to collapse
I'll see if this does anything, initally it looks like it did nothing but it's too early to tell as it could just be where I am right now
Skaterkemal said:
I'm also switching from xperia 1 to 1 IV and bought a metal frame case for the phone with a lower signal, the signal has dropped even more I don't use a case anymore
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Same here. It looks so nice with metal case. Call quality not that great also
Metal cases do degrade network signal very much. be it of any kind, GPS, carrier signals, Bluetooth and WI FI.
Sony uses its signal scale in quality, the rest of the companies in power.
I didn't get a 1 IV until the Android 13 release, upgrading from a 5 III. I also use a work iPhone 11 regularly. I'm in the US and my phones are all US market models, and I live in a large metropolitan area. Both of my phones are in carbon fiber cases with metal in them. Here are my observations, which seem to be more positive than what is posted here.
Wifi: My home network is Wifi 6, and the signal on the 1 IV is usually weaker than the iPhone 11. But, it's only by 1 or 2 dbm, per the data from my router. However, if you run a speedtest on both phones, the Xperia 1IV always gives a higher Mbps reading than the iPhone.
BT: I have WF-1000XM3 and M4s and both work fine on both phones. I can get further away from the phone with either headphones from the iPhone than the Xperia, but the Xperia works fine if it's sitting next to me or in my pocket. No issues with connecting to other devices like speakers or car stereos.
Cellular: My 1 IV is on T-Mobile, while my iPhone is on Verizon, so hard to compare there. However, my wife has an iPhone 14 Pro Max on T-Mobile, and in spot comparisons, my Xperia gets better reception and faster data connectivity. When I'm on 5G, my Xperia regularly gets over 1Gbps download speeds, even without full bars on the signal meter.
I am from Croatia and I have very poor 3G signal, 2G, 4G and 5G signals are OK so in my home there is no 3G signal at all and I am not available because my network doesnt have VoLTE. I am on 64.1.A.0.882 firmware. Before I would have signal problems but restart would fix that. Now, after restart nothing is fixed. Till now I reset my phone 2 times and it was on service repair because of fingerprint sensor. 2 days ago everything was OK. I don't know what is going on. Is there any fix? Could this be Google Play System problem? Because yesterday I got another Google Play System update of 9 MB for March and around that time this problem started and I don't see any fix.
I manage to solve problem. I call this code in the phone *#*#4636#*#* and it opens Testing. In there I went to
Phone info --> three dots --> Select radio band --> Automatic
and after that everything start to work. I don't know what radio band was set before because I couldn't read that. I gess that every time when problem happens I'll have to do this.

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