T-mobile US signal strength issues? - Xperia Z4 Tablet Q&A, Help & Troubleshooting

Greetings all, thanks for any help!
I got my Xperia Z4 LTE (US Version) Tablet, after being a longtime owner of a Xperia Z2 LTE Tablet which I left on an airplane to never see again.
And now I'm on a replacement unit experiencing some odd behavior that I chalked up to being a defective unit, but getting the same behavior on the replacement.
My Z2 would always show full bars LTE here in Los Angeles, but the Z4 is showing LTE no-to-low bars sitting right next to my LG G4 showing 4GLTE with full bars.
The weird thing is if I go into the About/Signal strength in the settings it shows practically the same signal strength on both my LG G4 and the Xperia Z4.
If I do speed test and get similar results on both devices.
But, If I switch to WCDMA preferred I get full bars! Weird.
Anyone have an idea what I am seeing? Is this normal? I mean it seems to work ok, but my OCD can't handle looking at my tablet with no to low signal strength!
Any help greatly appreciated!
Thanks,
-ben

Bars on my Z4 shows one to no bars, but the db strength via LTE discovery is -100db which is better than my Samsung S7 edge which shows 4 bars but -105 db in the application LTE discovery.

Hmmm...that's an interesting app. Gave me some new information that may explain.
One thing I got from running that app is that the devices show frequencies they are using differently:
My TMobile LG G4 shows:
DL EARFCN 19500-2399
UL EARFCN 19950-20399
DL Freq: 2110mhz-2155mhz
UL Freq: 1710mhz-1755mhz
LTE BAND 4
My Xperia Z4 shows:
DL EARCFN: 2300
UL EARCFN: 20300
DL Freq: 2145.0mhz
UL Freq: 1745mhz
LTE BAND 4
It appears that the TMobile branded LG G4 is using a range, and Xperia Z4 is locked on a single frequency, which may explain the low signal bars issue.
Can anyone confirm this? Is there a way to update the frequency ranges on the Xperia Z4 Tablet?
Thank all for looking!
-b

My z4 tablet shows the exact figures per what your G4 you listed above shows.
I'm actually comparing the z4 tablet on T Mobile and a ZTE ZMAX pro right now. I don't know what most these figures mean.
I did notice however under the section neighbor cells the ZTE switches between 1 and 5 cells whereby the z tablet is only showing 2 neighbor cells.
Also more differences under the show advanced data section. Both devices locked onto band 4 LTE.

Related

[Q] Signal looses completely from HSPA to EDGE

Hi, bought the xperia Z2 a week back. In my room I get good signal. Sometimes HSPA + but when i go down floor to to the dining area (where i have been seeing poor signal) the Z2 looses it signal then comes back to EDGE after half a minute. My old phone Iphones 4s, HTC One when it lose HSPA signal it goes back to EDGE.
My network setting is on 4G preferred. I have put it on WCDMA preferred still the same problem. On the same network i carried a Iphone 5 and the Xperia Z2, the z2 dropped but the iphone signal stays.
Any way to fix it? or whats causing the problem?
maximus_android said:
Hi, bought the xperia Z2 a week back. In my room I get good signal. Sometimes HSPA + but when i go down floor to to the dining area (where i have been seeing poor signal) the Z2 looses it signal then comes back to EDGE after half a minute. My old phone Iphones 4s, HTC One when it lose HSPA signal it goes back to EDGE.
My network setting is on 4G preferred. I have put it on WCDMA preferred still the same problem. On the same network i carried a Iphone 5 and the Xperia Z2, the z2 dropped but the iphone signal stays.
Any way to fix it? or whats causing the problem?
Click to expand...
Click to collapse
sony has taken note of mobile band issues, should be fixed in upcoming updates
Envious_Data said:
sony has taken note of mobile band issues, should be fixed in upcoming updates
Click to expand...
Click to collapse
Great to hear that i am not the only one facing this problem. how do you know?
maximus_android said:
Great to hear that i am not the only one facing this problem. how do you know?
Click to expand...
Click to collapse
its a common sony problem for mobile data to not work in some countries
is also common for Z2 for data to randomly stop
its also been noted on sony sites and sony team 7 dev mentioned it too

Signal reception is worse compared to other phones, how to improve it?

I have a standard EU model on Vodafone. Several times now I have gone to the same pub with friends. Inside, I always drop to GSM connection while my friends' S3, iphone 4 and galaxy nexus consistently manage to hang onto HSDPA+. This happened during a trip in the mountains as well. It's becoming increasingly obvious that my G3 has a worse reception than most other phones.
Is this expected? how can I improve the situation?
I agree with signal issues. I'm sat next to my partner both on Vodafone.she got a iphone 5s. She has 4bars of signal and im on zero.
welshandy2322 said:
I agree with signal issues. I'm sat next to my partner both on Vodafone.she got a iphone 5s. She has 4bars of signal and im on zero.
Click to expand...
Click to collapse
+1
The G3 has known problems on Vodafone(Vodafones fault)
I have had an M8, 1+1 and the G3 at the same time and the G3 is by far the best and on a par with my Nokia 1520 and the 1+1 was the worst. I have now sold both the M8 and 1+1 but they both lost signal quicker and were slower to get it back again and the G3 has slightly faster speed over 10 tests each. The WiFi was better on the M8 as it connected to my home WiFi before I got out of the car when I parked outside. They all work fine in the house so no difference.
My phone is a sim free 855 on EE and the WiFi is Sky. I haven't tested my other one yet but it seems to be the same.
It's happening to me. Also I had lost completely but fixed when reboot. I don't understand why. I heard put copper tape under the back cover for improve signal. I'll try and then let you know.
LG-D855 cihazımdan Tapatalk kullanılarak gönderildi
Vodafone Portugal I have issues too. Too much I think.
You people do realise "bars" of signal are meaningless? A "bar" is not a measurement of signal (it happens to be a measurement of pressure but thats is besides the point.) Phone signal doesn't really have a unit of measurement so it is given ASU (Arbitrary Strength Unit) which is based off the power of the signal (dBm) Go into settings, about phone -> Network and you will see the quoted ASU and dBm.
Therefore the way signal is represented by bars on a phone is entirely down to how the manufacturer chooses it to be displayed. For example 1 bar could represent 1 ASU on an iPhone, therefore a full 5 bars would mean anywhere from 5 ASU upwards. Whereas on a G3 1 bar could represent 3 ASU, therefore giving a larger display range.
Now I have plucked these figures out of thin air but I think you can see from that example how 1 bar on the G3 and 3 bars on the iPhone would actually be the same signal strength.
Granted if you have NONE and your partner has some, then that is clearly an issue. But don't compare bars, compare ASU.
Just wanted to add my experiences that I've had with my G3 for the past 2 months.
My G3 continuously gets a weaker and more unreliable signal (Three UK) than I have had on any other smartphone I have (One M7, One X+). It's incredibly frustrating as it means I never get LTE indoors but more importantly, my phone will very frequently lose data and cellular connection if I put it in my pocket. What good is a phone if it drops signal while its in your pocket?
573W1E said:
Just wanted to add my experiences that I've had with my G3 for the past 2 months.
My G3 continuously gets a weaker and more unreliable signal (Three UK) than I have had on any other smartphone I have (One M7, One X+). It's incredibly frustrating as it means I never get LTE indoors but more importantly, my phone will very frequently lose data and cellular connection if I put it in my pocket. What good is a phone if it drops signal while its in your pocket?
Click to expand...
Click to collapse
Wow, you got 4g on Three network, I went to Three from giffgaff and I had faster speeds on giffgaff 3g than I did with 4g on Three. I'm not on EE and very rarely lose 4g
Are you using a sim adaptor buy any chance?
GTCC said:
Wow, you got 4g on Three network, I went to Three from giffgaff and I had faster speeds on giffgaff 3g than I did with 4g on Three. I'm not on EE and very rarely lose 4g
Are you using a sim adaptor buy any chance?
Click to expand...
Click to collapse
I moved to Three from giffgaff and my speeds over both 3G (HSPA+) and 4G LTE have been consistently faster than anything I had on giffgaff. The city where I'm at (Newport) was not on the list of planned 4G cities for 2014 from Three, but it just started rolling out near the start of this month. I'm wondering if it was a rushed rollout to cover the area for the NATO Summit that was in the area a few weeks ago. I've averaged 20mbps download over LTE and about 7/8 down on HSPA+ which are both better than the 3mbps average I had on giffgaff. I'm not using a SIM Adaptor either, the Micro SIM that was in my HTC One M7 fit right into the G3.
I just wish the G3 kept a stronger and more reliable signal, these signal drop outs in my pocket and less reliable elsewhere are defo not Three's (or another carrier's fault), I've never had this issue with any other smartphone I have had. Poor show LG....
573W1E said:
I moved to Three from giffgaff and my speeds over both 3G (HSPA+) and 4G LTE have been consistently faster than anything I had on giffgaff. The city where I'm at (Newport) was not on the list of planned 4G cities for 2014 from Three, but it just started rolling out near the start of this month. I'm wondering if it was a rushed rollout to cover the area for the NATO Summit that was in the area a few weeks ago. I've averaged 20mbps download over LTE and about 7/8 down on HSPA+ which are both better than the 3mbps average I had on giffgaff. I'm not using a SIM Adaptor either, the Micro SIM that was in my HTC One M7 fit right into the G3.
I just wish the G3 kept a stronger and more reliable signal, these signal drop outs in my pocket and less reliable elsewhere are defo not Three's (or another carrier's fault), I've never had this issue with any other smartphone I have had. Poor show LG....
Click to expand...
Click to collapse
I would have to disagree with you about the reception on the G3 in my case at least. Both my G3's have better reception than my M8 or my Oneplus One. The G3 even keeps signal(albeit low) in my lift.
I'm in Solihull by the way and according to Three I should of had 4g inside but didn't even get it outside and only got good 4g when I went into Birmingham. Must also say that when I tried Three it was in my Nokia 1520
No problems here compared to my xiaomi mi2.
Same or even better reception.
I have the G3 on T-mobile (USA) and its the best reception phone i've had. Constantly gets LTE where all my previous phones struggled...
(I had HTC One m7, Nexus 5, Z1s, Galaxy S5... to name a few)

Terrible data strength: All locations, inside & outside

Little over 2 weeks with the G3 and I love the device with zero issues besides the very poor data signal strength. dBM rarely breaks into the 90's.
I pretty much get a poor signal all across Kansas City. Work, home and travel between 6 cities to and from signal strength is the same. I always have a working connection but the strength is just not there. My bars always show zero or the itty bitty one bar......but everything works, decently fast and operating.
My old S3 on Carbon and my wifes stock S3 always showed good strength, showed 10dBM less than my G3. Is this just how the G3's radio is setup? On PRL 51102, I may try changing the PRL to see if it helps.
Examples...
Screenshot_2014-10-16-21-09-33 by MBCo, on Flickr
Screenshot_2014-10-18-16-10-36 by MBCo, on Flickr
Screenshot_2014-10-18-16-10-43 by MBCo, on Flickr
Screenshot_2014-10-19-13-16-13 by MBCo, on Flickr
Screenshot_2014-10-21-17-55-00 by MBCo, on Flickr
Screenshot_2014-10-21-17-55-12 by MBCo, on Flickr
Something should be wrong with your phone. Go back to Lg and replace it. Cause, this phone is best by far i have ever used. I have used samsung Note 2 , 3 S4, s5, G2, G1,S2,S3. And this phone easily is on top for data
Given that you're in Sprint's backyard, I would think the signal strength, both 3G and LTE, would be quite strong across the KCMO region.
Out of curiosity.. Under Settings -> Wireless Networks (More) -> Network (Mobile Networks) -- What is Network Mode set to? Global? LTE/CDMA? If Global, change to LTE/CDMA and see if you see an improvement.
Also, for point of reference, my indoor signal strength at work shows -94 dBm on eHRPD (3G) connection. Fluctuates between 3 and 4 bars. Not sure how that dBm measurement would translate to LTE frequency bands, but I would think it should be similar.
Have you done a speed test to get an idea what kind of bandwidth your device is capable of even with what's perceived to be a weak signal?
wosiek said:
Given that you're in Sprint's backyard, I would think the signal strength, both 3G and LTE, would be quite strong across the KCMO region.
Out of curiosity.. Under Settings -> Wireless Networks (More) -> Network (Mobile Networks) -- What is Network Mode set to? Global? LTE/CDMA? If Global, change to LTE/CDMA and see if you see an improvement.
Also, for point of reference, my indoor signal strength at work shows -94 dBm on eHRPD (3G) connection. Fluctuates between 3 and 4 bars. Not sure how that dBm measurement would translate to LTE frequency bands, but I would think it should be similar.
Have you done a speed test to get an idea what kind of bandwidth your device is capable of even with what's perceived to be a weak signal?
Click to expand...
Click to collapse
One would think yes, being a KC resident home of Sprint I would get great service. In most cases I do.
It's been on LTE/CDMA and global. I haven't noticed if one is better than the other. Maybe a better handoff between 3G and Spark on Global. Update: Just got back from a local Sprint store and talked to a very knowledgeable Technician who has has first hand experience on all LG devices that their signal is like this across the board. Lower signal and dBM compared to HTC, Samsung or Motorola but still get great speeds.
I've done speed tests at the same time I noticed poor strength and actually surprised that despite the signal I get the same speeds as if I had better signal (lower dBM)
Screenshot_2014-10-28-13-22-27 by MBCo, on Flickr
I noticed low signal strength on the LTE frequency(the one showing in signal bars by default) from the beginning but it doesn't affect my speeds so I'm not complaining.
Does band 41 show a different logo for spark? I have never had spark, but s3 didn't have have tri-band, so it's possible you are on b41, and it has decent enough strength, so it just stays with b41. I Can keep b25 LTE down to around -117 db. You can check which band you are on with ##3282# and click lte, then view.
Sent from my LGLS990 using XDA Free mobile app
Currently enabled bands are 26 and 41
Band priority
1=25
2=26
3=41

Poor reception

Hi,
I recently bought a black z5c from handtec and I'm currently using it on US T-Mobile.
I think I have the apn settings set correctly but I'm only getting one bar for LTE here in LA, even outside with no buildings.
HSPA, however, has strong signal. Any recommendations?
Tuan
Sent from my E5823 using Tapatalk
I get very good signal with mine. Even with one bar I get good speeds (tested via speedtest).
You can just use the download internet settings under networks/more if you are worry about using the wrong apn settings.
I'm also using T-Mobile.
Sent from my SM-N910T using Tapatalk
Reception issue or perceived reception
I am having the same issue, but on AT&T. My model is the E5823, black. I have been swapping my sim card back and forth between the z5c and my Nexus 5 and have noticed that the nexus will have full bars of LTE while the z5c will have maybe one bar. More importantly, though--the db reading from the phones are almost exactly the same and the download speeds are very similar as well. So I think this may not be a reception issue in my case, but an issue with how the z5c displays reception vs how the nexus 5 does. The nexus 5 with full bars should having blazing LTE speed. Sadly, both of these phones are giving me barely 3 mb download speeds. I think AT&T may be having an issue in my area but I can't get a customer service rep to acknowledge it.
I hope I'm right--I'm loving this phone despite the terrible (possibly perceived) reception. I have downloaded an app called real signal and it shows a more accurate reading of actual reception and it is confirming my suspicion.
fortheoceans said:
I am having the same issue, but on AT&T. My model is the E5823, black. I have been swapping my sim card back and forth between the z5c and my Nexus 5 and have noticed that the nexus will have full bars of LTE while the z5c will have maybe one bar. More importantly, though--the db reading from the phones are almost exactly the same and the download speeds are very similar as well. So I think this may not be a reception issue in my case, but an issue with how the z5c displays reception vs how the nexus 5 does. The nexus 5 with full bars should having blazing LTE speed. Sadly, both of these phones are giving me barely 3 mb download speeds. I think AT&T may be having an issue in my area but I can't get a customer service rep to acknowledge it.
I hope I'm right--I'm loving this phone despite the terrible (possibly perceived) reception. I have downloaded an app called real signal and it shows a more accurate reading of actual reception and it is confirming my suspicion.
Click to expand...
Click to collapse
This is exactly my experience. Not as many bars as my other phone, but actual signal strength is almost identical. I think it's just a difference in how they are showing bars. I think signal strength is actually good.
Sent from my E5823 using Tapatalk
phositadc said:
This is exactly my experience. Not as many bars as my other phone, but actual signal strength is almost identical. I think it's just a difference in how they are showing bars. I think signal strength is actually good.
Sent from my E5823 using Tapatalk
Click to expand...
Click to collapse
I'm glad to hear that. This was driving me nuts thinking I'd have to return a phone that I imported and eat a 15% restocking fee. It's also really the only small phone I had my eye on once I saw that the Nexus 5X would be just as big as the regular sized Xperia Z5.
I'm experiencing something similar. I think I have 1 less bar of 4G signal in every place compared to my previous phone. But the phone still works great and seems to not drain more battery regarding this.
But the "time without signal %" is considerably lower than before. (Still. This could be just because of the bad 2G/3G signal at home, which is terrible and is improved now).
Also. Im now getting 4G+ signal (I think it's based on CAT 6). But maybe the strength is just the same as with 4G.
One more thing:
I bought my phone in Italy but I'm using it in Spain. Could that be an issue? I dont think so...because in Europe the LTE bands are almost the same everywhere.
Also. What would happen if we disable all other LTE bands from other countries? Could that help?
Sent from my E5823
I'm now having -107 dBm 33 asu. How bad is that?
thesebastian said:
I'm experiencing something similar. I think I have 1 less bar of 4G signal in every place compared to my previous phone. But the phone still works great and seems to not drain more battery regarding this.
But the "time without signal %" is considerably lower than before. (Still. This could be just because of the bad 2G/3G signal at home, which is terrible and is improved now).
Also. Im now getting 4G+ signal (I think it's based on CAT 6). But maybe the strength is just the same as with 4G.
One more thing:
I bought my phone in Italy but I'm using it in Spain. Could that be an issue? I dont think so...because in Europe the LTE bands are almost the same everywhere.
Also. What would happen if we disable all other LTE bands from other countries? Could that help?
Sent from my E5823
I'm now having -107 dBm 33 asu. How bad is that? [emoji14]
Click to expand...
Click to collapse
107 is pretty weak but without having another phone to compare it to it's impossible to say if it's the phone's fault or if you are just somewhere with a bad signal!
Sent from my E5823 using Tapatalk
Hi,
I think my signal is poor compared with my previous phone
I have 105 dbm
Enviado desde mi E5823 mediante Tapatalk
Hi,
Did you try entering Service Phone info and check settings from there ?
for that dial in :
*#*#service#*#*
then service settings and select the right network mode
chrisftlse said:
Hi,
Did you try entering Service Phone info and check settings from there ?
for that dial in :
*#*#service#*#*
then service settings and select the right network mode
Click to expand...
Click to collapse
My phone has this option selected "LTE_GSM_WCDMA" and I think that it's the right choice.
Sent from my E5823
I had same issue with att. Then I realized I forgot to call them and give them my imei number to put into their system. Did you do that?
Sent from my E5823 using Tapatalk
The imei will not impact reception. GSM is purely sim based. I'm curious about this issue as well. I had exact same issue with my z3c on tmous. Lower signal readings both visually and dbm but it operated fine
Sent from my Nexus 5X using Tapatalk
I got a Z5 compact and I'm definitely getting poorer reception than my previous phone (2013 Moto X) on AT&T. Not just the display, but I find more calls going to voicemail from my apartment than before.
I think it's just the way sony is translating actual signal strength to bars displayed. On WCDMA it looks correct, but on LTE bars are always low even though reception and signal is fine.

Cellular strength and throughput

We know how much you like to stream, ahem, "videos", and so cellular data is mega-important. Rate this thread to express how you think the OnePlus 8 Pro's LTE performs. A higher rating indicates that it's fantastic: throughput is excellent and signal strength is top-notch.
Then, drop a comment if you have anything to add.
Definitely worse range and mobile data speed on T-mobile Poland than in my previous Huawei P20 Pro. [emoji52]
Wysłane z mojego IN2023 przy użyciu Tapatalka
I have really big problems with the 4G Connectivity. Nearly no connection (0.8 Mbits) inside the house next to the open window. No problems before with my OP3T
From the beginning of using the phone, I have a problem with cyclical signal loss when I try to call someone or when someone tries to call me. I get a message that my SIM card is missing.
Interestingly, it happens just like I have the LTE signal turned on. When trying to establish a connection, LTE changes to 3G and it is at this point that the signal disappears, and then returns spontaneously after about 5 -10 seconds.
If I force the use of 3G, the connections work fine.
I tried to reset to factory settings, changed the SIM card between trays 1 and 2. I reset network settings. Unfortunately, nothing helps.
The only thing I haven't done yet is to exchange the card with the operator, but I treat it as a last resort. I do not believe that this was a physical malfunction of the card, because on the previous phone there were no problems.
It annoys me so much that I feel like throwing this phone out the window...
theKingJan said:
I have really big problems with the 4G Connectivity. Nearly no connection (0.8 Mbits) inside the house next to the open window. No problems before with my OP3T
Click to expand...
Click to collapse
I feel that this phone's cellular performance is worse than that of my OnePlus 7T. I live in a shallow canyon and have not the greatest reception, however with this phone I frequently get "Mobile network not available" when sitting in my living room, which I don't recall experiencing with the 7T.
My data speeds on T-Mobile 5g in Illinois are 25% what they were (25mbs vs 100mbs) on the 7t Mcclaren
For me in Lake Charles,La it has been great. The 5g dl speeds aren't that much faster than lte but the upload speed is. What's really nice coming from PixelXL3 is like when I'm in the bathroom at work before I would barely get a signal if any, and now it's almost like I'm outside & signal is good. Thankfully T-Mobile has just been improving and improving the last few years.
Slight better signal than my S9+
hi
Im using O2 with 5G sim card and data plan unlimited. (5G) also.
But i only have 2G/3G/4G
But when i put Vodafone sim card im gettin 5G 2G/3G/4G/5G
Strange
Much better especially 5G than my LG V40 ThinQ.
Hey guys, i have a question - i bought samsung s20 (exynos) and the signal strenght and data speed is worse than on my huawei mate 20 pro. So i want know how is cellular strength and speed on the one plus 8 pro? I work in a place with bad coverage but until the s20 i never had problems with the battery (usually finishing the day with 50%+ on the mate 20 pro, sometimes even 70% and now i am at 30-40% so i have to charge either at work or immediately when i am home). I am asking because i will change the samsung and it is either the one plus 8 pro or the iphone 11/12. Thanks.
Got 1+8pro - reception to make calls improved in my apartment from Note10+, 3G/4G speed is not good but I have wifi so am just happy to have calls.
I'll be testing this out shortly when mine arrives. At my home location lte connectivity is very poor generally around -104 to -114 dbm, we'll see how the OP8Pro does with little signal.
worst
my p30 pro used to work in my room (4g). 8 pro no signal. horrible
Device has amazing cellular signal sensitivity. Sitting on my old man's recliner at home i posted the dbm figures I got with Samsung and other devices. This device increased signal reception by around 11 dbm. Using Network Cell info lite for tests as I have with my previous devices. Amazing.

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