Develop Bugs

[Q] Need help. Can only detect GSM signals.

I'm using the E975 and I've unlocked the bootloader, installed CM11 on it.
However I realised that the ROM did not detect any signals. I couldn't make calls or SMS.
I had to manually go to the network settings and find the carrier (Singtel) to register everytime I start the phone.
I then flashed savvy 4 ROM to see if the network was any better. It was, but then I was limited to GSM only. I couldn't get 3G or 4G.
Before I unlocked the bootloader, I had 3G and 4G signals.
Then I decided to KDZ back to stock ROM. I had network but only limited to GSM.
I realised my phone could only detect GSM signals from Singtel, M1 and Starhub. I couldn't see 3G or 4G.
I don't know what to do now. I need help. Must I flash any basebands or modems or anything? Thanks

Your SIM card does not allow a connection to this network.

I recently just got a plan on the Canadian cell service provider, WIND, on my Roger's phone. I unlocked it and make it able to use AWS bands, which is what WIND is on. The phone read WIND fine when I was getting the plan, but only a few hours later the signal died and now I'm getting "Your SIM does not allow a connection to the network".
I tried using ODIN and flashing back to stock 4.1.1, but that has not worked. I don't know what to do right now.
I also tried turning the radio on and off, and that has not worked.
I'm stumped. Can anybody help?

You have to reapply the AWS mod the moment you flash another modem.

My phone was was modded and has had SEVERAL different modems and never had to re apply the mod is a hardware firmware flash and should stick. You could try I suppose but it may b with all the ownership changes with carriers here they may have changed frequencies. Like Telus screwed 90% of Public mobile customers.
When I modded mine I went through QPST there is a thread in development.
Sent from my AWS enabled I317m ❤ Running DN3 v5.

AgentTran said:
I recently just got a plan on the Canadian cell service provider, WIND, on my Roger's phone. I unlocked it and make it able to use AWS bands, which is what WIND is on. The phone read WIND fine when I was getting the plan, but only a few hours later the signal died and now I'm getting "Your SIM does not allow a connection to the network".
I tried using ODIN and flashing back to stock 4.1.1, but that has not worked. I don't know what to do right now.
I also tried turning the radio on and off, and that has not worked.
I'm stumped. Can anybody help?
Click to expand...
Click to collapse
Blacklisted maybe?

[Q] I unlocked and rooted/flashed and now shows wrong network.

Hi guys,
I had my Note 2 on Koodo network for less than a year. Recently I unlocked it and sold it to a friend. My friend is on Videotron network and the phone shows the signal with an R like if my friend was roaming however it works properly. I also tried switching the network manually but it doesn't want to connect to Videotron. Is there something that I need to flash such as modem maybe ? It's running on Slimkat latest stable version.

Problem with 2G network.

Hello everybody! I have a problem. When I am in 2G network, network signal is good, but no one can call me. SMS is incoming and internet works. But no calls. Sometimes and me can't even be able to call. What is the problem? With 3G network no problem.
Device - T999N.
I live in Uzbekistan. Operator is Beeline Uzbekistan.

Is the phone running the latest bootloader and modem? Which ROM is installed?

Modem T999NUVUBOH1.
Now installed RR от d2att. But I've try CyanogenMod, LiteRom, OctOs. And STOCK that was, I do not remember.
And what do you mean with the bootloader?

The bootloader is what allows the phone to boot the ROM. It's similar to a computer BIOS.
This happens on the stock ROM too?

audit13 said:
The bootloader is what allows the phone to boot the ROM. It's similar to a computer BIOS.
Click to expand...
Click to collapse
I now about Bios. Bootloader is kernel in custom roms?
audit13 said:
This happens on the stock ROM too?
Click to expand...
Click to collapse
I don't remember. Bought and immediately flashed custom.

Bootloader is not the kernel. The Kernel is part of the operating system.

Well, now I'll try to change the bootloader. Can you give the actual link?
And it will not break unlock?

The simplest way to update everything on the phone would be to flash a stock ROM from sammobile.com. Flashing a stock ROM should not re-lock the phone to a carrier. I have used several Samsung phones in the past and, once the phone has been network unlocked, it has stayed unlocked.
Before flashing anything, confirm the phone's model # in download mode.

audit13 said:
The simplest way to update everything on the phone would be to flash a stock ROM from sammobile.com. Flashing a stock ROM should not re-lock the phone to a carrier. I have used several Samsung phones in the past and, once the phone has been network unlocked, it has stayed unlocked.
Before flashing anything, confirm the phone's model # in download mode.
Click to expand...
Click to collapse
I flashed T999NUVUBOH1_T999NTMBBOH1_TMB from Sammobile. But Phone is bootlooped. It shows only logo MetroPCS Wireless for all and notification LED lights.

Phone is booted. But in stock also I can't call in the EDGE network.

Does the carrier have 2g for voice calls? I know that 2g is being eliminated in the USA.

audit13 said:
Does the carrier have 2g for voice calls? I know that 2g is being eliminated in the USA.
Click to expand...
Click to collapse
Oh sure. Half of the our country works in 2G.

Hmm, I'm not sure why 2g calls don't work as the s3 definitely supports 2g.

Cellular Data Issue With Marshmallow And Nougat Roms

Good morning, I am running the latest Lineage 14.1 rom (14.1-20171204-Nightly-d2att) on the Samsung Galaxy S3 (SGH-I747) phone, this phone is rooted, running the latest TWRP (3.2.1.0) and the I747UCUFNJ2 baseband on this device, this device is fully rooted, and is SIM unlocked for use with any carrier, my carrier is T-Mobile.
Ever since installing this rom, and any roms higher than android 6.0 (I've ran CM 12, CM 12.1, CM 13, SlimKat, and AOSP roms), everything works perfectly except for my cellular data will not go higher than Edge (2G) and my complete cell connection will randomly disconnect for a few seconds then reconnect itself.
I've tried everything from changing the APN settings specified by T-Mobile for LTE connectivity, I've gotten a replacement SIM from T-Mobile, I'm lost at this point as to what the issue could be. According to T-Mobile I do have the BYOD option so unlike some carriers, the SIM is not supposed to be locked to a specific IMEI.
Does anyone have any idea what could be the issue and/or a solution to this? Is there a higher baseband that needs to be loaded to fix this that I'm not aware of?
Thanks for your help everyone.

The phone is also running the latest bootloader?

Yes it is.

I assume the cellular data works properly with a stock ROM.
Does the cellular data work with the sim in another phone? Cellular data works with another sim card in the s3?

try *#*#4636*#*#

Pigoath said:
try *#*#4636*#*#
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Click to collapse
connection problem or invalid MMI code
edit:nvm i got it working with *#*#4636#*#*, what can i don this menu to get lte running