Update ROM on Tmobile phone currently loaded with AT&T ROM - General Questions and Answers

I bought a used advertised as a "FACTORY UNLOCKED" HTC ONE M8 with AT&T's 4.4.2 installed. I am unable to update via the AT&T software update menu. It always fails with no software updates available. A little research revealed that this phone was originally a Tmobile phone (thru IMEI). I've been advised by HTC support that to update the ROM that I should update it with Tmobile's 4.28.502.2 ROM and then UNLOCK it for my AT&T SIM card. And that any attempts to update it with another AT&T ROM would render the phone inoperatable. Which is why I'm confused. The phone already has an AT&T ROM. Can someone direct me in the proper method to update the ROM for my phone?
I recently discovered thru the aid of HTC support. That the phone was at one time rooted because the CID was altered to 11111111 to UNLOCK it from its branded carrier. I was able to verify that it is no longer rooted via Root Checker Basic. I've also been told (by the seller) that since the CID was overlaid that I can flash any carrier's ROM onto this phone. Any truth to this? HTC support will not confirm nor deny this claim.
Thanks

Related

Asia/Europe version

Hey,
I have the verizon m8 unlocked to work on any gsm network. I'll be travelling to India next week and want to make sure the phone will work fine with Indian networks without a problem?
Also, Is there any way i can get the ROM that comes with the factory version of the phone (without the amazon and verizon apps)? In short, I want a stock rom without any trace of verizon.
I'm new to the HTC world and i've read a lot about RUU but haven't got a clear information on what it is.
I'm on 5.0.1, unlocked, s-off, rooted.
Thanks.
Prithvi

issue carrier unlocking my one x

Hey guys,
It has been a long time since I have done everything with my AT&T One X and I am having some trouble. I want to carrier unlock my phone so I can use it when I travel to Israel in 2 weeks. I got the code from AT&T through their website. I am running CM-NostromoPop v2.0.4.
The directions I received from AT&T are:
1. Power off the device and remove the AT&T SIM card.
2. Insert non-AT&T SIM card.
3. Power on the device. Wait a few moments, allowing the device to fully power-up.
4. Enter the unlock code when prompted.
5. Press OK. The device is unlocked.
The only microSIM I have is a Verizon SIM I use in my Verizon tablet. It is active on a Verizon account. I put that SIM in and turned on the phone, it popped up asking for the code, I type the code in correctly and press Unlock (it doesn't say OK) and it says "unlock unsuccessful" and waits for me to put the code in again. Has anyone run into the problem? Is the problem more likely to be CyanogeMod of the SIM card? I am currently installing ViperXL on my phone to see if a stock ROM would work better but I only have 2 tries left until my phone is permanently locked to the AT&T network.
I called AT&T and they said factory reset the phone or bring it into an AT&T store. I can't do either of those without flashing back to stock and I cannot figure out how to do that. Can someone explain to me or link me to a post on how to flash back to complete stock (the latest stock version preferrably, I probably won't be rooting my phone or anything anymore)
Some info about my phone:
I am S-OFF
CID is 11111111
HBOOT is 2.15
Radio is 1.31a.32.45.16_2
Recovery is TWRP 2.8.7.1
Thank you very much in advance

Ordered G5 from Buyspry : Need few simple answers

I read the threads related to LG G5 from buyspry seller. Sadly I cannot revert the order I made on ebay I need to need few important things(to me) as I will be stuck with this Phone. I live in Bangladesh so I definitely cannot use it w/o SIM UNLOCKED.
I have known that If I upgrade or downgrade I will lose SIM UNLOCK.
Also I cannot root (till now) as it requires downgrade.
And I will be stuck with firmware it came in from the seller.
But still , Here are the things I really need to know :
1. If I compromise myself to use that firmware 20i_un (UNLOCKED) forever it comes from seller & do no modifications will the Phone be perfectly fine?
2. Does that awkward firmware gives or will give any OTA update? Cause if it gives and that accidentally gets installed I am screwed with a T-Mobile Locked device.
3. I will use my local GSM SIM , Will I be able to use Portable Hotspot with that ROM? (I couldn't, with my G2 At&t Unlocked stock At&t ROM)
4. Apart from any upgrade/downgrade(ROM flashing) is there any way I might lose UNLOCK???
Please guys, please do help me with these topics. I just recently damaged my LG G2 and lost a phone Xiaomi MI 4 (Mugged) I really am screwed
minhaz.sourav said:
1. If I compromise myself to use that firmware 20i_un (UNLOCKED) forever it comes from seller & do no modifications will the Phone be perfectly fine?
2. Does that awkward firmware gives or will give any OTA update? Cause if it gives and that accidentally gets installed I am screwed with a T-Mobile Locked device.
3. I will use my local GSM SIM , Will I be able to use Portable Hotspot with that ROM? (I couldn't, with my G2 At&t Unlocked stock At&t ROM)
4. Apart from any upgrade/downgrade(ROM flashing) is there any way I might lose UNLOCK???
Click to expand...
Click to collapse
1) Probably.
2) Probably not.
3) No idea. You'd have to discuss that with your carrier.
4) Probably not, but it's still not clear how they achieved unlock via the ROM so who knows?
minhaz.sourav said:
I read the threads related to LG G5 from buyspry seller. Sadly I cannot revert the order I made on ebay I need to need few important things(to me) as I will be stuck with this Phone. I live in Bangladesh so I definitely cannot use it w/o SIM UNLOCKED.
I have known that If I upgrade or downgrade I will lose SIM UNLOCK.
Also I cannot root (till now) as it requires downgrade.
And I will be stuck with firmware it came in from the seller.
But still , Here are the things I really need to know :
1. If I compromise myself to use that firmware 20i_un (UNLOCKED) forever it comes from seller & do no modifications will the Phone be perfectly fine?
2. Does that awkward firmware gives or will give any OTA update? Cause if it gives and that accidentally gets installed I am screwed with a T-Mobile Locked device.
3. I will use my local GSM SIM , Will I be able to use Portable Hotspot with that ROM? (I couldn't, with my G2 At&t Unlocked stock At&t ROM)
4. Apart from any upgrade/downgrade(ROM flashing) is there any way I might lose UNLOCK???
Please guys, please do help me with these topics. I just recently damaged my LG G2 and lost a phone Xiaomi MI 4 (Mugged) I really am screwed
Click to expand...
Click to collapse
You lose unlock if you ever update or do anything to the ROM. Phone is garbage unless you're on Tmobile. Obviously you are going to want to update it eventually because it's assumed that LG will be issuing an official Oreo update.
I bought the device and reverted it to official firmware. With a few (lengthy) calls to Tmobile I eventually got them to white list my device for the Sim unlock app to work. I was first told that it was impossible for them to do because it wasn't a Tmobile device, meaning not purchased through tmobile (not sure how buyspry got them, maybe corporate wholesale or something).
I sent a bunch of photos to them showing the box and other tmobile documentation that came with the phone. They agreed to unlock it and after about a week's wait while tech support was working out the specifics, the app successfully unlocked it.
I am on tmobile but told them I preferred to have it unlocked if necessary for international travel.
So yeah, long story short if you're not on tmobile and have no way to get tmobile to officially unlock it return the device. Complain to eBay that the device had hacked firmware or whatever (which is 100% true) and they will let you return it.
Sent from my LG-H830 using Tapatalk
Idea
Sdobron said:
You lose unlock if you ever update or do anything to the ROM. Phone is garbage unless you're on Tmobile. Obviously you are going to want to update it eventually because it's assumed that LG will be issuing an official Oreo update.
I bought the device and reverted it to official firmware. With a few (lengthy) calls to Tmobile I eventually got them to white list my device for the Sim unlock app to work. I was first told that it was impossible for them to do because it wasn't a Tmobile device, meaning not purchased through tmobile (not sure how buyspry got them, maybe corporate wholesale or something).
I sent a bunch of photos to them showing the box and other tmobile documentation that came with the phone. They agreed to unlock it and after about a week's wait while tech support was working out the specifics, the app successfully unlocked it.
I am on tmobile but told them I preferred to have it unlocked if necessary for international travel.
So yeah, long story short if you're not on tmobile and have no way to get tmobile to officially unlock it return the device. Complain to eBay that the device had hacked firmware or whatever (which is 100% true) and they will let you return it.
Sent from my LG-H830 using Tapatalk
Click to expand...
Click to collapse
What yall think i need advice from you all, what if i flash back the version h830v30a so it will lock ok, and after flashing it and try to unlock it with device unlock after i bought the code online. Tell me what you ? think
tfat1000 said:
What yall think i need advice from you all, what if i flash back the version h830v30a so it will lock ok, and after flashing it and try to unlock it with device unlock after i bought the code online. Tell me what you [emoji848] think
Click to expand...
Click to collapse
Device unlock doesn't take a code. It checks with Tmobile database
Sent from my LG-H830 using Tapatalk
I know, i mean if i flash the h830v30a version it will still have the device unlock app it will clear the hack rom,
Sent from my LG-H830 using Tapatalk
---------- Post added at 02:09 PM ---------- Previous post was at 02:07 PM ----------
What do you think?
Sent from my LG-H830 using Tapatalk
minhaz.sourav said:
I read the threads related to LG G5 from buyspry seller. Sadly I cannot revert the order I made on ebay I need to need few important things(to me) as I will be stuck with this Phone. I live in Bangladesh so I definitely cannot use it w/o SIM UNLOCKED.
I have known that If I upgrade or downgrade I will lose SIM UNLOCK.
Also I cannot root (till now) as it requires downgrade.
And I will be stuck with firmware it came in from the seller.
But still , Here are the things I really need to know :
1. If I compromise myself to use that firmware 20i_un (UNLOCKED) forever it comes from seller & do no modifications will the Phone be perfectly fine?
2. Does that awkward firmware gives or will give any OTA update? Cause if it gives and that accidentally gets installed I am screwed with a T-Mobile Locked device.
3. I will use my local GSM SIM , Will I be able to use Portable Hotspot with that ROM? (I couldn't, with my G2 At&t Unlocked stock At&t ROM)
4. Apart from any upgrade/downgrade(ROM flashing) is there any way I might lose UNLOCK???
Please guys, please do help me with these topics. I just recently damaged my LG G2 and lost a phone Xiaomi MI 4 (Mugged) I really am screwed
Click to expand...
Click to collapse
Has anyone ever tried to check their imei using the tmobile site imei check, i checked mine and it wasn't know by the server
Sent from my LG-H830 using Tapatalk

Would installing unlocked bootloader and firmware unlock the phone?

So what I want to do is switch this phone to straight talk but want the att bloatware off this. If I install unlocked firmware and root the device would that make it unlocked? Like not carrier locked. Straight talk said I can already use a Sim despite it being locked but I wanna unlock it myself.
I don't think att will yet and not sure if they will at all. I'm converting my chapter 13 bankruptcy to a 7 on Tuesday and att bill is rolled into it so the phones will be mine once that is discharged but not sure if they will unlock them right after or if it will take months,that's why I'm asking this. I already reinstalled att firmware on this phone because I tried to install a custom room and messed up due to the bootloader issue of it being v5 I think.

trying to recover a used u11

Alright guys. Have not been on in years. Couldn't pass up an opportunity. $40 U11 in near mint physical condition. Now on to the fun part.
HTC U11
2PZC300 U-3U
Attaching photos of build info
The phone runs off WiFi perfectly. However it will not connect to mobile service (US ATT)
It registered my cell phone number so it is reading the card.
The seller says it was a Sprint phone but everything I can find says that Sprint builds are based on 2PZC5.
I want to just take it back to factory stock and then go back in and add twrp etc. I just don't know where to begin. Anyone have any ideas
Added photos
Well just got curious and did an IMEI check with T-Mobile. They list the IMEI number as a 2PZC5 model but the back of the phone says 2PZC300.
Really hope someone has some ideas. Because at this point I am leaning towards someone changed the imei number or something.
Also when I insert my sim into the phone it pops up asking what carrier I am using. After that the att apn settings are applied buts that's it. So I don't think it is carrier locked.
Alright so I can't get s-off to take again but I have figured out the firmware I can flash is for the unlocked us version but even flashing the latest firmware and installing omj badboy us unlocked I still don't have cell service. It ask me which carrier I am using with the sim card insert. It has yet to ask for an unlock code. I cannot use any dialer codes to check serial etc.
The only rom that let me use dialer codes was the Sprint based rom by omj but I can't flash firmware for it. I don't think this phone is done. Hoping someone reads this and responds with an idea
Well another update. Emailed HTC with all the info I had. They confirmed that the phone was originally a Sprint based phone. Now I need to figure out how to s-off so I change ruu back to Sprint. Sunshine won't pass test and s-off had just came out when I got out of rooting.
This thread will help
https://forum.xda-developers.com/u11/help/htc-u11-downgrade-pie-to-oreo-t3962791
Well I have reached the end of my rope. Finally figured out which base it was based on HTC helping me lol. Flashed the correct firmware with no issues. Flashed the correct ruu using sd card method and failed on systemimg_23. Now can't access fastboot via pc in anything but bootloader. Download mode and ruu mode don't recognize on my PC. Have uninstalled all drivers and reinstalled fresh drivers with no luck. Thought I was on the right path but unfortunately not.

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