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[Q] T-Mobile Samsung Galaxy S 4G on AT&T Network..

I gave my old Samsung Galaxy S 4G phone that I had on T-Mobile to my girlfriend and unlocked it through t-mobile to be able to use it on her AT&T network. She placed her AT&T sim card in the phone and I unlocked it. The phone works fine but it will not go past "Edge" speed, is this due to the different network frequencies or is there anything else there can be done so she can get 3g at least? Would I have to Root the phone to be able to do so or is there any other easier ways to go about it? Thanks in advance for your help.

MeetGameteXY said:
The phone works fine but it will not go past "Edge" speed, is this due to the different network frequencies or is there anything else there can be done so she can get 3g at least? Would I have to Root the phone to be able to do so or is there any other easier ways to go about it? Thanks in advance for your help.
Click to expand...
Click to collapse
I switched to AT&T to get the HTC One X, but I hated that phone (but it had a nice camera), so I got the AT&T Galaxy Note.
I unlocked my SGS4G so I could use it on AT&T to test radio changes, but also I noticed that I only got edge. If I go outside on a really sunny day sometimes I see it get hspa, but I don't think t-mobile phones can get 4G on AT&T's network.
I would expect at most getting edge. The ONE time I did see the phone go to hspa, I still didn't see xfer rates increase. It was slow as hell.
I think the answer is finding the right modem.bin. Our radio device is a little different then the other galaxy s phones, and most of the ones that use this same modem are on t-mobile. I'm hoping to find another phone that uses the same modem on at&t.

What he ^^ said

What he ^^ said

yea, I know... old thead is old.
bhundven said:
I switched to AT&T to get the HTC One X, but I hated that phone (but it had a nice camera), so I got the AT&T Galaxy Note.
I unlocked my SGS4G so I could use it on AT&T to test radio changes, but also I noticed that I only got edge. If I go outside on a really sunny day sometimes I see it get hspa, but I don't think t-mobile phones can get 4G on AT&T's network.
I would expect at most getting edge. The ONE time I did see the phone go to hspa, I still didn't see xfer rates increase. It was slow as hell.
I think the answer is finding the right modem.bin. Our radio device is a little different then the other galaxy s phones, and most of the ones that use this same modem are on t-mobile. I'm hoping to find another phone that uses the same modem on at&t.
Click to expand...
Click to collapse
Actually, I was wrong. I was hitting the same stupid build prop thing where you're only on hspa if you're using data. If not it bumps you down to 3g.
AT&T works fine on this device.

AT&T on T-Mo Galaxy S 4G
bhundven said:
Actually, I was wrong. I was hitting the same stupid build prop thing where you're only on hspa if you're using data. If not it bumps you down to 3g.
AT&T works fine on this device.
Click to expand...
Click to collapse
Yeah, I just recently moved to AT&T bringing this phone. It shows a 3g status but seems to be as fast as it was on T-Mo but depending on the location. My wife has the same device on T-Mo and we drove from Chicago to Florida finding that usually one of us had a signal.
The visual voicemail isn't available from AT&T on this phone but the basic v/m works

I need help on unlocking my SGS4G for AT&T. Every time I try the app method, it either returns the code as "null" or has some busybox error. And the hexcode method doesn't work because mobile terminal can't find the file on my phone. I am running Beanstalk 4.4 ROM, and it is rooted. How can I unlock it?

Jay_P11 said:
I need help on unlocking my SGS4G for AT&T. Every time I try the app method, it either returns the code as "null" or has some busybox error. And the hexcode method doesn't work because mobile terminal can't find the file on my phone. I am running Beanstalk 4.4 ROM, and it is rooted. How can I unlock it?
Click to expand...
Click to collapse
Try going back to BML and unlocking there as the methods that you'll find on this forum are more reliable that way.
This is one of the free methods I have:
http://forum.xda-developers.com/showthread.php?t=1419468
If you still can't get it to work, I do have a paid app on Google Play that can work for you:
http://forum.xda-developers.com/showthread.php?t=2243585

FBis251 said:
Try going back to BML and unlocking there as the methods that you'll find on this forum are more reliable that way.
This is one of the free methods I have:
http://forum.xda-developers.com/showthread.php?t=1419468
If you still can't get it to work, I do have a paid app on Google Play that can work for you:
http://forum.xda-developers.com/showthread.php?t=2243585
Click to expand...
Click to collapse
It is on BML, I'll try those methods but if they don't work I'll probably have to flash back to stock, root, and then unlock it.

Bml= stock...

champ1919 said:
Bml= stock...
Click to expand...
Click to collapse
I've read countless posts on here saying that was just a kernel... Thanks for the correction

@champ1919 is correct, BML refers to stock touchwiz roms. I recommended that because although I don't own this phone anymore, I wrote the unlock script a while back and I know it works fine on stock roms if you install busybox from google play, after rooting the phone.
Once your phone is unlocked, any newer roms you install will keep the unlock and if you decide to go back to stock after THAT, your phone will still remain unlocked.

FBis251 said:
@champ1919 is correct, BML refers to stock touchwiz roms. I recommended that because although I don't own this phone anymore, I wrote the unlock script a while back and I know it works fine on stock roms if you install busybox from google play, after rooting the phone.
Once your phone is unlocked, any newer roms you install will keep the unlock and if you decide to go back to stock after THAT, your phone will still remain unlocked.
Click to expand...
Click to collapse
This seems like the most sure fire way of going about this, I haven't had time to do it yet but I think I'll go with stock then unlock.

SCH-R530 from US Cellular - why no worky?

Hey ladies and gets,
I am new here and I do not have much experience. I have been on an android binge for a week now and I have read a lot of threads, and flashed my phone so many times already.
Here is the info:
Samsung Galaxy SIII (LTE I guess)
SCH-R530, and in some places it shows SCH-R530U
Currently running on the latest nightly cyo..10.2
IMEI starts with 99000... and I have checked its not stolen or anything - there is also a sticker behind the bat that confirms it.
Originally a US Cellular Phone, I want to get it working with T-Mobile.
Things I have tried:
-I got the Samsung Tool Kit (donated), received all the updates - and the phone still does not unlock the network operators.
-Used a method from youtube - CDMA Workshop - connect to the serial port - security - samsung defaults - screen on pc says unlocked but phone is not although it is answering to the program.
- No option for the network lock as known in the 530
-Used three different online services - but they said no can do.
- Called tmobile - and placed a request and they said - that IME does not correspond to the model of the phone(???)
I am a student, I can't afford to get anything else - so please help or point me in the right direction. Thank you

I don't think you can do it.

I don't believe it will work because Us cellular is cdma and T-Mobile is gsm.
Sent from my Nexus 4 using xda premium

GottaProblemBro said:
I don't believe it will work because Us cellular is cdma and T-Mobile is gsm.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
There seem to be different opinions on the net. Phone like mine have the added abillity to receive CDMA radios i guess, but they do not lack any of the hardware for gsm.
I am not sure about any of this however, thats why I came here.

Bsqueeze44 said:
There seem to be different opinions on the net. Phone like mine have the added abillity to receive CDMA radios i guess, but they do not lack any of the hardware for gsm.
I am not sure about any of this however, thats why I came here.
Click to expand...
Click to collapse
in my experience with all the cdma gs3 varian, only the verizon one that have gsm capability.

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Just a little update:
I have not been able to make any progress at all.
I have updated my 4.3 on the regular basis - however when I did the nightly 6, and 7 both locked up on the boot menu.
Anyways, today i reinserted my tmobile sim card and when I try to make a call - I get Verizon Wireless automated services that say that i can be transferred to complete the call with a credit card and stuff.
Why verizon? this is a us cellular phone?
Also when i switch to gsm mode - it still does not locate any tmobile operators?
US Cell phone is a dead end. This thread might as well be deleted.

Bsqueeze44 said:
Just a little update:
I have not been able to make any progress at all.
I have updated my 4.3 on the regular basis - however when I did the nightly 6, and 7 both locked up on the boot menu.
Anyways, today i reinserted my tmobile sim card and when I try to make a call - I get Verizon Wireless automated services that say that i can be transferred to complete the call with a credit card and stuff.
Why verizon? this is a us cellular phone?
Also when i switch to gsm mode - it still does not locate any tmobile operators?
US Cell phone is a dead end. This thread might as well be deleted.
Click to expand...
Click to collapse
Vzw bought out USC... in some areas I believe? Any how now no the USC will not work on T-Mobile. At least not stock....yet. It may be possible to get voice working but that would be about it. If you could vet data the most it would possibly be is edge as far as I know.... If you want to try something I would try flashing a sch-i535 ROM of 4.0.x-4.1.1 Odin would be best but do not flash the radio/modem. I am not Of 100% on this but Odin might skip over the modem if flashing i535 ROM to the r530. If not mobile Odin is able to only flash selected partitions of choice. Make sure you use a pre rooted ROM. After that and it is successful you may be able to follow the guide posted some where in here on how to use the i535 globally. It will require APN pro I believe. And another app to be able to select gsm global (don't recall for sure) if you find the guide it will tell you. . good luck and let me know if that helps.

Bonkurei said:
in my experience with all the cdma gs3 varian, only the verizon one that have gsm capability.
Click to expand...
Click to collapse
I agree with
that verizon is (gsm+cdma)
Sent using Tapatalk

theories testing all ideas on removing carrier blocks on domestic bands

Starting thread for general theories, ideas, and ways of removing carrier aw restrictions. Whether or not its possible and to further the chance of 3g/4g on the phone with any domestic gsm carrier.

Ill lead. Im running straightalk on att from the i535v verizon 4.3 rooted, alliance rom, knox removed by me. Kernel of not telling. many many build.prop and csc tweaks. Safestrapped and efs imei backed up. All the blah blah you can think of. But i can not obtain above edge for anything. I read a post of a guy that got the E to jump to a G for a split second. I know its true. Mine did only once. But since. No. So any thoughts. Ideas. Theroies. On how verizon is locking out the domestic gsm is welcome. Its NOT a hardware issue.. Its a carrier block. Lets work and solve this.

An0nYm0u5.bat said:
Ill lead. Im running straightalk on att from the i535v verizon 4.3 rooted, alliance rom, knox removed by me. Kernel of not telling. many many build.prop and csc tweaks. Safestrapped and efs imei backed up. All the blah blah you can think of. But i can not obtain above edge for anything. I read a post of a guy that got the E to jump to a G for a split second. I know its true. Mine did only once. But since. No. So any thoughts. Ideas. Theroies. On how verizon is locking out the domestic gsm is welcome. Its NOT a hardware issue.. Its a carrier block. Lets work and solve this.
Click to expand...
Click to collapse
I have found things and feild modes that should allow fr the changes. I have been trying to upload screen shots but XDA is not letting me. Why not moderator. ?? And this is not my field of development. Nor am I versed in it .

An0nYm0u5.bat said:
Ill lead. Im running straightalk on att from the i535v verizon 4.3 rooted, alliance rom, knox removed by me. Kernel of not telling. many many build.prop and csc tweaks. Safestrapped and efs imei backed up. All the blah blah you can think of. But i can not obtain above edge for anything. I read a post of a guy that got the E to jump to a G for a split second. I know its true. Mine did only once. But since. No. So any thoughts. Ideas. Theroies. On how verizon is locking out the domestic gsm is welcome. Its NOT a hardware issue.. Its a carrier block. Lets work and solve this.
Click to expand...
Click to collapse
I am pretty sure its a frequency thing. You can get 3g abroad but not domestic because of the frequency Verizon decided they wanted to support. You can't change the frequency to one the phones hardware didn't support. That g you have seen was most likely a bug. I could be wrong but I remember reading that about a year ago.

ThePagel said:
I am pretty sure its a frequency thing. You can get 3g abroad but not domestic because of the frequency Verizon decided they wanted to support. You can't change the frequency to one the phones hardware didn't support. That g you have seen was most likely a bug. I could be wrong but I remember reading that about a year ago.
Click to expand...
Click to collapse
I've been in the settings all day. And I found a patch. The ability to connect (hardware) is there. Samsung - "all models whether Verizon, att, sprint, etc. Carry the same hardware from Samsung. Only applies to same model phones. Their may be restrictions enacted by each separate carrier but we would not be aware or able to assist in that concern". But Yea. Check this out and tell me your thoughts. Www.internauta37.altervista.org/how-and-patch-fully-enable-gsm-verizon-cdma-phones-android

An0nYm0u5.bat said:
I've been in the settings all day. And I found a patch. The ability to connect (hardware) is there. Samsung - "all models whether Verizon, att, sprint, etc. Carry the same hardware from Samsung. Only applies to same model phones. Their may be restrictions enacted by each separate carrier but we would not be aware or able to assist in that concern". But Yea. Check this out and tell me your thoughts. Www.internauta37.altervista.org/how-and-patch-fully-enable-gsm-verizon-cdma-phones-android
Click to expand...
Click to collapse
In order for this to work you will also need to go into /system/efs/carrier/hiddenmenu and edit hiddenmenu fom OFF to ON if you haven't already.

ThePagel said:
In order for this to work you will also need to go into /system/efs/carrier/hiddenmenu and edit hiddenmenu fom OFF to ON if you haven't already.
Click to expand...
Click to collapse
Yea. I had to do so way in the start. I've made the phone show as the i9300 now. Enabled 4g on/off gsm in more settings. Enabled all networks. Completely removed Verizon. Andddddddd if I'm right...... I think I have a boot loader unlock theory.. will know today if 3g/4g is enabled.

Can I use an ATT S8+ on Verizon's network?

Hi,
I was recently gifted an unlocked ATT S8+ (SM-G955U) which I'm trying to activate to my Verizon account. I've read conflicting information about this, and after going to the Verizon store and calling them directly I'm thoroughly confused.
The rep on the phone told me that the phone is "incompatible" with their network based on the IMEI number. From what I gather, the hardware (and model numbers) on all the major carrier's S8+s are the same and simply have different firmware. I've also read that they're interchangeable. Has anyone successfully gotten the ATT S8+ on Verizon? I'm almost feeling like it's something where I would need to jump through more hoops and speak to a manager to get them to do it, but before I did I wanted to get others input. Thanks!

I heard that the phone will work, you'll need to flash the Verizon firmware onto the AT&T phone.

Thanks Richie. Do you think that Verizon is telling me that the IMEI is "incompatible" because I may need to flash another firmware to enable CDMA? Or are some versions of the S4+ really incompatible on their network.
May there be possible success to get them to activate it anyway?

kebas239 said:
Hi,
I was recently gifted an unlocked ATT S8+ (SM-G955U) which I'm trying to activate to my Verizon account. I've read conflicting information about this, and after going to the Verizon store and calling them directly I'm thoroughly confused.
The rep on the phone told me that the phone is "incompatible" with their network based on the IMEI number. From what I gather, the hardware (and model numbers) on all the major carrier's S8+s are the same and simply have different firmware. I've also read that they're interchangeable. Has anyone successfully gotten the ATT S8+ on Verizon? I'm almost feeling like it's something where I would need to jump through more hoops and speak to a manager to get them to do it, but before I did I wanted to get others input. Thanks!
Click to expand...
Click to collapse
kebas239 said:
Thanks Richie. Do you think that Verizon is telling me that the IMEI is "incompatible" because I may need to flash another firmware to enable CDMA? Or are some versions of the S4+ really incompatible on their network.
May there be possible success to get them to activate it anyway?
Click to expand...
Click to collapse
Do you already have an active Verizon SIM card? Like in another phone?

Mr. Orange 645 said:
Do you already have an active Verizon SIM card? Like in another phone?
Click to expand...
Click to collapse
I do not - only because I'm coming from an S4 (which has the larger SIM card). I had to get a new one.

kebas239 said:
Hi,
I was recently gifted an unlocked ATT S8+ (SM-G955U) which I'm trying to activate to my Verizon account. I've read conflicting information about this, and after going to the Verizon store and calling them directly I'm thoroughly confused.
The rep on the phone told me that the phone is "incompatible" with their network based on the IMEI number. From what I gather, the hardware (and model numbers) on all the major carrier's S8+s are the same and simply have different firmware. I've also read that they're interchangeable. Has anyone successfully gotten the ATT S8+ on Verizon? I'm almost feeling like it's something where I would need to jump through more hoops and speak to a manager to get them to do it, but before I did I wanted to get others input. Thanks!
Click to expand...
Click to collapse
The IMEI thing and Verizon not provisioning your phone to activate on their network is the ONLY obstacle you have.
All the US S8/S8+/Note8 variants are identical and can be cross-flashed to whatever carrier you want. You can easily grab the VZW firmware and flash it on to your AT&T device, fully converting it, however the IMEI won't be in Verizon's system since your particular phone wasn't sold by Verizon.
Somehow get around that and your phone will be fully compatible on VZWs network.

kebas239 said:
Thanks Richie. Do you think that Verizon is telling me that the IMEI is "incompatible" because I may need to flash another firmware to enable CDMA? Or are some versions of the S4+ really incompatible on their network.
May there be possible success to get them to activate it anyway?
Click to expand...
Click to collapse
Don't worry about what Verizon reps are telling you because most often than not they are following a standard procedure. And they only Input your IMEI into a service like this one:https://www.verizonwireless.com/bring-your-own-device/#checkDevice
As your IMEI is for an AT&T phone, the brand model has an A appended at the end (as in AT&T).
However, you should still investigate this issue and try the steps recommended by the other guys. You will be able to use your phone with a VZV sim without reaching to Verizon

kebas239 said:
Hi,
I was recently gifted an unlocked ATT S8+ (SM-G955U) which I'm trying to activate to my Verizon account. I've read conflicting information about this, and after going to the Verizon store and calling them directly I'm thoroughly confused.
The rep on the phone told me that the phone is "incompatible" with their network based on the IMEI number. From what I gather, the hardware (and model numbers) on all the major carrier's S8+s are the same and simply have different firmware. I've also read that they're interchangeable. Has anyone successfully gotten the ATT S8+ on Verizon? I'm almost feeling like it's something where I would need to jump through more hoops and speak to a manager to get them to do it, but before I did I wanted to get others input. Thanks!
Click to expand...
Click to collapse
I have an AT&T S8 + on Verizon's network, had to unlock the phone, I did flash VZV firmware.
Works for me.

Thanks all for the responses! So it does look like I can do it then, but I just need to get Verizon to activate the new SIM. Think if I could find another phone that's compatible, throw the SIM in, activate, then switch the SIM to the S8+ it would work? (Assuming I've flashed the Verizon firmware on it).
Also, I'm trying to find out how to flash the phone properly. I don't really need root, but I'll take it if its easy. Thinking in my scenario, I'd follow this thread, correct?
https://forum.xda-developers.com/ve...opment/rom-s8-allcarriersrootedstock-t3659232

kebas239 said:
Thanks all for the responses! So it does look like I can do it then, but I just need to get Verizon to activate the new SIM. Think if I could find another phone that's compatible, throw the SIM in, activate, then switch the SIM to the S8+ it would work? (Assuming I've flashed the Verizon firmware on it).
Also, I'm trying to find out how to flash the phone properly. I don't really need root, but I'll take it if its easy. Thinking in my scenario, I'd follow this thread, correct?
https://forum.xda-developers.com/ve...opment/rom-s8-allcarriersrootedstock-t3659232
Click to expand...
Click to collapse
Yes, if you can get VZW to activate a nano SIM then all you have to do is pop it in your S8+, and it will work perfectly.
You don't HAVE to flash the Verizon firmware, but you'll won't be able to use certain features such as VoLTE and WiFi calling with the ATT firmware, so I recommend it. Not a necessity though.
To change carrier firmware, follow this thread:
https://forum.xda-developers.com/galaxy-s8+/how-to/snap-guide-flashing-standard-fw-carrier-t3627255
Can't help you with rooting. Sorry, I stopped rooting my phones long ago.

Mr. Orange 645 said:
Yes, if you can get VZW to activate a nano SIM then all you have to do is pop it in your S8+, and it will work perfectly.
You don't HAVE to flash the Verizon firmware, but you'll won't be able to use certain features such as VoLTE and WiFi calling with the ATT firmware, so I recommend it. Not a necessity though.
To change carrier firmware, follow this thread:
https://forum.xda-developers.com/galaxy-s8+/how-to/snap-guide-flashing-standard-fw-carrier-t3627255
Can't help you with rooting. Sorry, I stopped rooting my phones long ago.
Click to expand...
Click to collapse
This is great information! I'll call back Verizon and knowing all this I have something to back myself up with to at least try to convince them to activate the SIM (if not, I'll find a temporary phone to activate).
Thank you (and everyone else) for all the help!

I was able to get Verizon to activate the SIM and IMEI of the new S8. When I checked my account online to verify, it shows the correct numbers. Unfortunately, the phone is still not able to make calls or connect to the mobile network.
Following this, I rooted and flashed a deodexed stock ROM/firmware that is compatible with all carriers. This made no difference in the issue.
On the status bar, normal reception for my area is shown. There is no data (LTE/3G, etc.) connection, however. In looking at the APN settings, there are multiple Verizon options to choose. "Verizon Internet" (VZWINTERNET) is what is selected. Under the network operators, Automatic is selected. I tried changing it to Manual, but I do not get an option to select Verizon. Only ATT or T-Mobile. Under SIM Card Status, It's says that I'm on an unknown network.
Any ideas on what I could do to diagnose this? Sorry for all the questions, but I want to be able to get this phone to work so bad!
Thanks!

Success! I was about to give up, but decided to try a few more things.
1) To register a new SIM on VZW, it needs to initially go into a VZW based phone to work correctly. Once doing this, I saw some changes:
- I could now see my phone number.
- Verizon was an option under the network operators setting.
This did not solve my problem, however, as I still could not connect to the network. When selecting VZW, the request would fail and say to try again later. So onto the next (and last!) thing I did...
2) Download VZW firmware and flash via ODEN (The Comsey version, but I don't think that matters). I added the BL, AP, CP & CSC (included in the zip file) using the default options. I found this firmware at the below link and grabbed the latest version. The download was very slow for me (I had to run it overnight), but numerous posters stated that they are a reliable source so I took a chance.
https://www.sammobile.com/firmwares/galaxy-s8-plus/SM-G955U1/VZW/download/G955U1UES2AQL1/201500/
I'm just so glad everything is working now. Thank you so much to all who have responded to the thread to guide me in the right direction! Hope this helps someone else who may be having the same trouble.

Samsung A515F unlocked TPA to AT&T USA, what to expect?

I'd like to get Wifi calling, Visual Voicemail, and 4g on an unlocked A515F.
As of now the phone reports itself as this:
Baseband A51FXXU3BTH5
Service provider (stuff) TPA TPA TPA TPA
Network AT&T
Moble network state disconnected
Service in service
IMS not registered
Mobile voice LTE
Mobile data LTE
VoLTE seems to be on? I thought this doesn't work on unlocked phones.
Being new to this the providers are all over the map on all kinds of stuff regarding unlocked phones. (AT&T rant I'm sure many of you have been here Grrrr.)
Network mode auto is LTE/3G/2G, there is no 4G option (as I believe in my research is how it is with unlocked phones)
So, I suppose the question is, if I follow the steps outlined in this thread:
https://forum.xda-developers.com/galaxy-a51/how-to/guide-how-to-change-csc-a51-t4129243
and flash the AT&T firmware, will I get 4G, Visual voicemail, and WiFi calling? As well as whatever the heck ATT disables for unlocked devices.
Will this require another trip to the store and a 4G SIM put in there?
New to this, but I have tried to research this as much as I could. Thanks for all the info.
Steve

Forum?
Have I put this in the wrong sub forum? Should it be in the firmware flashing forum?

First don't need to flash anything unless you want to waste your time with bloatware.
What you have to look into for your service desires, is do you have wifi in your service plan? If yes, did you activate it on the A51 you are using? (Also make sure your sim card is sim 1)
Also you don't have to use any provider's visual voicemail to get it for your phone. I've used YouMail for about 2 decades.
As far as lte & 4G. My phone is from same csc TPA TPA/TPA. I've seen both 4G & 4G LTE on my service. So your question about that was a little vague. But U.S. providers (at&t or tmo) won't tell you 90% of the time that you have to get 4G LTE sim card & pay for a 4G LTE service plan on order to get it.

Thanks for the reply.
It's sim 1. IMS not registered my be the issue, ill call ATT tomorrow.
I've been able to get visual voicemail back by installing the APK. The play store says it is not compatible with my device, APK was fine. I will check and try what you suggested.
Yeah, it might get a few chuckles here but i've had a S5 for years, and replaced it 3 times with ebay s5's. Love it. Initally i just popped my old iphone 4 sim in there and used it forever. I never had wifi calling and when i attempted to enable it it said the sim was the problem.
Imagine my surprise after going to the store and getting the proper sim i see the 4g icon appear and wifi calling, etc. All these were ATT firmware phones, on power the logo pops up, bloatware, etc on the S5's. Miss it already. What am i going to do with all these batteries and chargers?
This has been a different thing. Being in the States, not traveling overseas (at this time i believe no one will have us anyway) and this unlocked phone. As far as bloatware goes, its still kinda there in one way or another. Clicking on a link within chrome forces samsung internet every once in a while. Yeah, there is no real extra stuff on the device as it is. Its just weird.
Getting a sim for this at the store took a little more time then I thought it would. The employee was checking out the phone for a little longer then just handing me a sim.
I've changed the APN, possibly to the incorrect settings, to get 4g and wifi calling bacK. But that seemed to knock out any mobile data. Granted I may have entered the wrong settings. I'll look for others.
What's really confusing is the lack of these things. Is this phone cabible of 4g in the hardware? Wifi calling seems to be a forced ATT unlocked thing.
Sorry, long winded. This article states that when I am seeing the 3g lte it is really 4g.
Egads, link without 10 posts wont let happen. It's the B&H photo article regarding unlocked phones.
The wireless calling is not happening. Is this inherent to unlocked phones on ATT? VoLTE is on as far as the settings tell me. I'll poke around some more.
Many thanks
Steve

4g was on the S5 so i would assume it was part of the plan. Switching to the nano sim A51 should not knock that out.
I've read so many posts here, as i know my questions are pretty basic compared to other discussions, so thanks again.
If you'd like to discuss the numerology hidden in octal permissions let me know
If there was a screenshot of the mobile networks
Data roaming off
VoLTE SIM1 On
LTE/3G/2G (auto connect) checked
3G/2G (auto connect)
3G only
2G only

Yeah, I just bricked it ish. Tried the A51U-1 At&T firmware USA. I'm downloading the Italian Samsung firmware to get it back I hope. "Only official binaries are allowed".

The phone was in emergency mode and showing the PIT error with the A51U1 firmware.
The Italian firmware set uploaded fine. Now only it only shows a white circle with the little lightning bolt inside if connected to a usb cable. Computer wont recognize it. Resetting it vol down and power/bixby key turns the display off for a sec but it comes right back to the same thing. This is bricked huh. Any ideas?
Holy cow I held the vol down buxby bixby button down as I removed the usb cable I am getting the factory data reset screen. Maybe there is hope.
Yeah same thing again. If anyone has this issue you can at least get back to factory reset by holding the buttons and quickly yanking the USB cable out when the charging logo disappears.
-edit again
Recovery mode vol down + power. When it blanks keep the power button down and push vol up.
I wonder what to try in the choices.
Wipe cache?
Reboot to bootloader?
Im looking at the last log there is a whole lot going on. At about 80% of it is shows a ******FILE SYSTEM MODIFIED****, then it looks like its setting the octal permissions on a bunch of stuff, then it looks like it cant find /etc/firmware/calliope_sram.bin and from a bunch of other places in the filesystem.
After about 87% it looks like it is basically describing how it is displaying the recovery mode screen.
Displayed is samsung/a51nsxx/a5111/RP1A.200720.012/A51FXXU4EUC8
The phone came as an A51F. Was trying to flash to A51U1(ATT).
-Edit again.
I have hope for this but I am aware I am a flippin second from bricking the device. Any input is highly appreciated.
Steve

I will attempt this if I can find the download screen,
[RECOVERY] TWRP For Samsung Galaxy A51 SM-A515F One UI 3.0 DUB1 Android 11
Assalom-o-Alaikum! How to Root and Flash TWRP on Samsung Galaxy A51 SM-A515F Android 11 – Build number DUB1 – Android security patch level: February 1, 2021. The TWRP version is 3.5.0 developed and brought to you by [email protected] senior...
forum.xda-developers.com

looks like is TPA for Panama, Downloading firmware through Samsung firmware downloader. But I would like the USA ATT firmware so I can have 4g and wifi calling. OMG Im gonna brick this thing.

Reboot computer and phone reboots into Cyrillic I find this rather funny at this point. But it is the phone setup screen and routine.
edit-- Hilarious. Didn't even install the Panama TPA firmware unless Samsung Firmware Downloader did it by itself while I was taking a nap. Cyrillic boot? looks like it is on the network at least I think can talk to someone been a lonely couple of days.
edit again== This is a linux computer that can make phone calls. WTF is the deal here. Really? All this stuff? I'm exploring all the custom ROMs and whatnot here in the forums. All I wanted was 4G and wifi calling. That is what my S5 did and I loved it. The S5. Flippin old phone but a fun one. Thousands of dollars to ATT over the years and they wont turn this phone to 4g on for me?
Thanks for everyone that has put effort into this that is amazing I really cant thank you enough.
edit yet again. Maybe flashing the firmware I have to wait for a couple of hours for it to fire up? I am assuming everything I am doing is wrong.
Can do... https://forum.xda-developers.com/t/guide-how-to-change-csc-on-a51.4129243/

LOL welcome to Yandex love from Los Angeles xoxoxoxo. Veppine miatsen? Ya gavira pa Ruski?

Well I see the LTE and 4G icon at times now, Dunno about wifi calling tho.
Network AT&T
Mobile network state Disconnected
Service state In service
IMS registration state Not registered
Voice and network type LTE
Also android 11 I may have been 10 before?
No bloatware but the Yandex stuff.
No ATT logo on startup.
Again thanks for all your work and knowledge on this stuff, I'll poke around some more and see what firmware is actually on there. It says SM-A515F/DS.
Oh! A515FXXU4EUC8.
SER/SER,SER/TPA
Again thanks - ramblings form a newbie.
SER CSC, well that explains Yandex.

adeptustech said:
First don't need to flash anything unless you want to waste your time with bloatware.
What you have to look into for your service desires, is do you have wifi in your service plan? If yes, did you activate it on the A51 you are using? (Also make sure your sim card is sim 1)
Also you don't have to use any provider's visual voicemail to get it for your phone. I've used YouMail for about 2 decades.
As far as lte & 4G. My phone is from same csc TPA TPA/TPA. I've seen both 4G & 4G LTE on my service. So your question about that was a little vague. But U.S. providers (at&t or tmo) won't tell you 90% of the time that you have to get 4G LTE sim card & pay for a 4G LTE service plan on order to get it.
Click to expand...
Click to collapse
Welp, now
A515FXXU4EUC8.
SER/SER,SER/TPA

Twrp as ap.
Force encrypt,
Magisk,
Then what? Odin U or U1 firmware wont that overwrite ap? Agh.
Extract PIT from the working firmware and pit tab? Agh.
Consider myself lucky running SER TPA firmware?
Am I about to trip Knox?

Welp, getting the 3G going away feb 2022 messages from ATT even though it does display the little 4G icon at times. Called Att they say they can see the imei. They say sending a new phone. Not an a51 who knows. Most likely some thing that up the account to $100 a month.
Be warned the you will loose everything is real on firmware flashing but weird. Thought i copied the entire filesysyem but things dropped out
.
This is an old model phone so i understand and my first shot at flashing it. Probably try again as i think i did not flash the u1 correctly. Still can talk, text, whatever. Frustrating, old phone, who cares.

Ah they sent me a S10e for free no complaints. Ill try the att a51 firmware again nothing to loose at this point see what happens and follow the guides.