Question No network and missing 4G bands after water damage - Samsung Galaxy S22 Plus

My phone (G996U1) had water damage. I thought it was dead but now it works, and flawlessly other than network which is dead. It only supports B7, B38, B41 etc now. It used to support other bands too
I have no idea what happened. Please comment if you have any idea.
(Already tried flashing XAA, XAS, TMB, USC firmwares nothing works. Tried some service mode thingy to unlock all bands. Now I got 5G bands which I didn't have before, but no 4G).

Power it down, open it up, disconnect the battery and completely dry it out. Corrosion never sleeps.

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GT-i9100 network trouble!!

My brand new GT-i9100 is barely usable. I've spent the last week wrestling with it (bought it new from ebay) to get it to work, but I'm at my wit's end. Any help would be greatly appreciated. Here's the problem:
My Galaxy S 2 (now rooted and currently running SlimRom) partially or completely loses cellular signal about 60% of the time, often in places where I know there is reception. I'm using Telus' network in Canada. It will lose data, lose ability to make or receive calls, and fail to send text messages. The indication of signal loss is not clear, IE it will say "emergency calls only", "no service available", or even say I have service but I really don't. However the cutting out seems to occur consistently depending on where I am located. For example I seem to get OK signal at my house, but zero at my friend's house. I know it's not the network in this case, since my friend is also on Telus and they get fine reception. I've done some testing and here are some possible causes that I can think of:
network cold spot - No, see example above. It also cuts out in urban populated areas where the signal is strong
phone compatibility - unlikely, since Bell offered the i9100M, which I'm led to believe is physically identical to the normal i9100, and Bell and Telus operate over the same frequencies. Also when it does get signal it can transmit data fine
SIM card - No. The first thing I did when I discovered this problem was get a new SIM card. Nothing changed
SlimRom - No. The phone was acting like this out of the box with the stock image.
Radio firmware - Unlikely. I've flashed at least 6 different firmwares, including KG6, KH3, LQ6, LP6, KI4, and even LD3, which I believe is the firmware the Canadian i9100-M ships with, so would logically work fine. The carrier for that was Bell, and I believe Bell and Telus operate on the same frequencies
a hardware defect in the design of the phone or the antenna itself - the last possible option I can think of. I hope it's not this, because then I would have to undo all the modifications I've done in an attempt to fix my phone, and pray the seller accepts the return
Please, if anyone could offer any assistance that would be great.
Telus frequencies:
2G
CDMA 850/1900
EVDO 850/1900
3G (and fake 4G)
HSDPA 850/1900
HSPA+ 850/1900
UMTS 850/1900
WCDMA 850/1900
1x EV-DO CDMA2000
4G (called 4G+)
LTE 1700/2100
Indoril said:
My brand new GT-i9100 is barely usable. I've spent the last week wrestling with it (bought it new from ebay) to get it to work, but I'm at my wit's end. Any help would be greatly appreciated. Here's the problem:
My Galaxy S 2 (now rooted and currently running SlimRom) partially or completely loses cellular signal about 60% of the time, often in places where I know there is reception. I'm using Telus' network in Canada. It will lose data, lose ability to make or receive calls, and fail to send text messages. The indication of signal loss is not clear, IE it will say "emergency calls only", "no service available", or even say I have service but I really don't. However the cutting out seems to occur consistently depending on where I am located. For example I seem to get OK signal at my house, but zero at my friend's house. I know it's not the network in this case, since my friend is also on Telus and they get fine reception. I've done some testing and here are some possible causes that I can think of:
network cold spot - No, see example above. It also cuts out in urban populated areas where the signal is strong
phone compatibility - unlikely, since Bell offered the i9100M, which I'm led to believe is physically identical to the normal i9100, and Bell and Telus operate over the same frequencies. Also when it does get signal it can transmit data fine
SIM card - No. The first thing I did when I discovered this problem was get a new SIM card. Nothing changed
SlimRom - No. The phone was acting like this out of the box with the stock image.
Radio firmware - Unlikely. I've flashed at least 6 different firmwares, including KG6, KH3, LQ6, LP6, KI4, and even LD3, which I believe is the firmware the Canadian i9100-M ships with, so would logically work fine. The carrier for that was Bell, and I believe Bell and Telus operate on the same frequencies
a hardware defect in the design of the phone or the antenna itself - the last possible option I can think of. I hope it's not this, because then I would have to undo all the modifications I've done in an attempt to fix my phone, and pray the seller accepts the return
Please, if anyone could offer any assistance that would be great.
Telus frequencies:
2G
CDMA 850/1900
EVDO 850/1900
3G (and fake 4G)
HSDPA 850/1900
HSPA+ 850/1900
UMTS 850/1900
WCDMA 850/1900
1x EV-DO CDMA2000
4G (called 4G+)
LTE 1700/2100
Click to expand...
Click to collapse
Well.. I think you got one of the Korean ones.. There is someone in China or Korea, or who knows maybe Samsung who is taking the SHW-M250S, a horrid Korean version of the S2 and changing the housing and software to make them look as the GT-I9100. Even the back labels say GT-I9100 and the software itself.. however, you can tell them apart because they are way lighter and very flimsy and also because the SIM Card tray is different from the one on the original GT-I9100.
So, I know it's very late but the problem is not you, is the phone. It might look brand new, but it is not compatible with networks in the US and many countries as Korea seems to use a different network standard. I was not able to get any data working on this model when I was in the Dominican Republic. I recently got a few of them in a lot of devices I bought for resale after I moved to the US and I couldn't get any of the 14 phones I got to connect to cellular. I decided to strip them off for parts.

AWS(Band 4) Working on D803

Haven't seen any post on this, but I got AWS working on a Bell LG G2(D803)
Added band support using QPST and connected to Wind no problem.
Care to share your method?
I roughly followed this: http://forum.xda-developers.com/cro...ad-progress-please-leave-im-updating-t2871269
No need to root the phone, it goes into diag mode when you set the usb connection to PC mode.
I used 115868544 as my NV value. Not sure if you can add more bands but AWS was the only thing I was interested in.
Hi, I have tried Googling this but I still don't really know how this works.
I have a D800 that offers LTE 700 / 850 / 1700 / 1900 / 2100.
However, I need LTE 1800 for 4G in New Zealand.
Since Snapdragon 800s have modems on board, can I flash the bands for D802 and get 4G?
I don't really know about this so please help.
Thanks
I didn't mess around with any of the LTE bands, only the WCDMA bands.
I have tried changing WCDMA and LTE bands on my VZW VS980 being used on ATT network.
After several attempts, under different Roms and Kernels, I have been unsuccessful in changing either.
1877 NV value can be changed but leaves phone unusable while 6828 NV value changes do not stick after reboot.
If anyone has been successful in getting VZW branded G2 activated on ATT, please let know.
Here is a thread that has lot of information... Most of the changes, I found are reversible. So go at it...
http://forum.xda-developers.com/showthread.php?t=2871269

[Q] Nexus 9 LTE on Vodafone UK doesn't get LTE

Hi,
There's a thread going on on the Vodafone UK forums about the Nexus 9 LTE not connecting to Vodafone UK on anything higher than 3G. I don't think this is very well known as the LTE version isn't as popular as the Wifi version, and then there are multiple mobile operators to choose from, so this might not affect many people.
Basically, a known working Vodafone 4G SIM in a known 4G coverage area will only establish 3G, never H, H+ or LTE/4G - this has been tested with multiple devices (I've got two here now) and multiple SIM's. The devices are unlocked, Vodafone don't require IMEI registration or anything like that. It should just be a case of putting the SIM's in. I've done all the checks I can think of (SIM's in another device - they get 4G, other operators SIM's in the device get 4G) etc.
Vodafone use LTE band 20 (and band 7 in a very few locations for LTE-A). Band 20 is known to work on the radios in the device because the same devices can connect to EE, who also use LTE band 20.
HTC are not interested as they say its a network problem, the device can register on EE and advised me to contact Vodafone.
Vodafone are saying its an unsupported device, I didn't buy it from them and don't really care, their first line support said the SIM is registering on their GSM network but never registers on the 4G network hence no coverage. After a conversation with second line support I was told that the device is trying to register on band 8 (900MHz) rather than band 20 (800MHz) which means that its a software/hardware problem - I'm a little bit dubious about this as how would they know unless it was negotiated by the SIM or something as their equipment uses 800MHz... ? I think he was basically lying to me to fob me off.
Google don't even have a way of contacting them about the device.
So as a consumer I'm stuck! Is there anyway I can debug the device myself? Can I see what bands are being used at different points in he SIM registering process with any software? Basically - any help or advice at all guys. It sucks to spend a load of cash on a device that half works, but what REALLY sucks is having no way to escalate a clear cut problem because there are so many companies involved!
Thanks in advance!

Only LTE works on V300L

Hello guys,
Quite the unexpected happened with this newly received phone. My country has at least 2 WCDMA and GSM bands in common with Korean carriers, but my phone seems only able to connect to LTE (even when forcing 3G or 2G in the secret menu).
I'm not sure whether this fits into the broader "no signal" issue that forces people to root their phones in order to connect to any network.
+ I would've thought that flashing the radio/modem would be enough to solve such an issue, but I'm likely too naive.
Any missed info about this LTE-only problem?
Thank you very much for your assistance!
Use 4g switcher app

Question Major issues BC72 canada

Wondering if anyone else has network issues with their BC72 in Canada. I'm on the fido network which means no 5g.
The phone works absolutely fine on wifi, but throw in a sim card and the problems are as follows:
Phone randomly freezes with the screen off, needing a manual reboot.
Camera fails to start half the time
Calls drop, texts fail to send
Apps take ages to open or freeze during use
All of this is intermittent so it can work fine for hours then become basically unusable.
I know this is the Chinese version so I'm wondering if flashing the ROM would help? Thanks in advance
dajee said:
Wondering if anyone else has network issues with their BC72 in Canada. I'm on the fido network which means no 5g.
The phone works absolutely fine on wifi, but throw in a sim card and the problems are as follows:
Phone randomly freezes with the screen off, needing a manual reboot.
Camera fails to start half the time
Calls drop, texts fail to send
Apps take ages to open or freeze during use
All of this is intermittent so it can work fine for hours then become basically unusable.
I know this is the Chinese version so I'm wondering if flashing the ROM would help? Thanks in advance
Click to expand...
Click to collapse
What bands does Fido use?? Also sounds like a faulty phone tbh...mind you I'm in the US with the same device
Ainz_Ooal_Gown said:
What bands does Fido use?? Also sounds like a faulty phone tbh...mind you I'm in the US with the same device
Click to expand...
Click to collapse
according to the fido forums
GSM ~ EDGE (2G) ~ on band 5 (850MHz).
UMTS or WCDMA ~ HSPA (3G) / HSPA+ (4G) ~ on band 5 (850 MHz).
To access LTE, the device must be compatible with one or more of the following:
700 MHz on Band 12;
850MHz on Band 5;
1900 MHz on Band 2, Band 25;
1700/2100 MHz on Band 4, Band 66;
2600 MHz on Band 7.
Fido doesn't offer 5G
I’ve been using this phone in Canada for years but I don’t have these issues. The CN firmware has different Google services including the phone and text app and also the camera app. Also it’s always trying to connect to servers in China but it’s extremely slo in Canada. You can flash a TW firmware and I’ll be good. Flashing stock firmware doesn’t require root or unlocking. Also I was with Fido before and the LTE bands seemed okay since I never experienced a signal issue.

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