Unlocking before or after debranding/flashing - General Questions and Answers

I will be debranding and flashing an ATT Lumia 640 and flash it to T-Mobile ROM. I have the unlock code for it -- does it make any difference if I do it before or after?
I know that I need to take the ATT SIM out before I debrand & flash. Should I put the T-mobile SIM in, unlock and then debrand with the SIM in, or should I debrand without any SIM, put the SIM in after flashing and unlock.

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Can't enter the SIM Unlock in HTC ROM

Hello Everybody,
I have ATT Tilt. Yesterday I did CID Unlock and successfully flashed the HTC ROM:
RUU_Kaiser_HTC_WWE_3.03.405.0_radio_sign_25.70.40. 02_1.64.06.04
Today I received SIM unlock code from ATT. When I booted the phone with my old T-Mobile card the gets stuck in a white screen with message:
“Checking SIM lock status, please wait…”
I can’t get over it to enter the SIM unlock code. I hope there is a way around so I do not need to go back to ATT ROM just to SIM unlock the phone.
I remember that few days ago, when I put the T-Mobile SIM card in Tilt and Tilt was still on the ATT ROM it sent me to a screen requesting me to enter the SIM unlock code.
vb7805 said:
Hello Everybody,
I have ATT Tilt. Yesterday I did CID Unlock and successfully flashed the HTC ROM:
RUU_Kaiser_HTC_WWE_3.03.405.0_radio_sign_25.70.40. 02_1.64.06.04
Today I received SIM unlock code from ATT. When I booted the phone with my old T-Mobile card the gets stuck in a white screen with message:
“Checking SIM lock status, please wait…”
I can’t get over it to enter the SIM unlock code. I hope there is a way around so I do not need to go back to ATT ROM just to SIM unlock the phone.
I remember that few days ago, when I put the T-Mobile SIM card in Tilt and Tilt was still on the ATT ROM it sent me to a screen requesting me to enter the SIM unlock code.
Click to expand...
Click to collapse
Try to flash back to stock Tilt rom and ATT Radio, then hard rest, then put the T-Mobile sim in. If that doesn't work, I suggest reading the Unlocker stickies, there is an unlock tool release.
Yes, it worked, after flashing a stock ATT ROM. Now is fully unlocked but it will take me another couple of hours to put all staff back into it
Thank you!

[Q] Unlocking HTC inspire from AT&T no unlock prompt?

Hi everyone. I received the unlock code from AT&T and after I insert my non AT&T sim card and boot the phone up, I don't get the network unlock prompt. I get "sim not provisioned mm #2" how do I get the unlock prompt to come back up? I was rooted and running CM 7, but flashed it back to a the non rooted HTC stock rom from HTC's website. Any help/ideas are appreciated!
Are you SIM unlocked or bootloader unlocked? How did you root?
bananagranola said:
Are you SIM unlocked or bootloader unlocked? How did you root?
Click to expand...
Click to collapse
I'm sorry, I don't understand the difference between SIM unlocked & bootloader unlocked, I just want it unlocked so it can be used on different carriers. AT&T has already given me the code to use.
When I rooted, I used aahk, but when I put the stock HTC rom back, I lost root access.
Are you still S-Off? Which carrier's SIM are you trying to use? Some carriers lock their SIM cards, so only SIM unlocking the phone doesn't work.
bananagranola said:
Are you still S-Off? Which carrier's SIM are you trying to use? Some carriers lock their SIM cards, so only SIM unlocking the phone doesn't work.
Click to expand...
Click to collapse
Yes, s-off and I tried a verizon and a tracphone SIM
also tried a red pocket SIM and t-mobile SIM. I get the "sim not provisioned MM #2" message. No prompt
shannonmarie11 said:
Yes, s-off and I tried a verizon and a tracphone SIM
also tried a red pocket SIM and t-mobile SIM. I get the "sim not provisioned MM #2" message. No prompt
Click to expand...
Click to collapse
Since you used the aahk and are still soff than you already have Sim unlock. Not all carriers and Sims play nice with unlocked phones. Sometimes a different Sim will do the trick.
Example when I had unlocked my iPhone way back in the day (original) it would not work using my sisters tmo Sim but it would on my brothers tmo sim
Sent from my Nexus 4 using xda app-developers app
Sim not provisioned mm#2 usually means the Sim card hasn't been activated, if the phone was Sim locked you would be prompted for the unlock code. Sounds like you're ready to go
Sent from my Desire HD using xda app-developers app

Sim Unlock

Is there a way to get a Sim unlocked on this phone?

ATT sim lock problem

Actually have ATT A9(CID is BS-US001) with unlocked bootloader , root and s-off. after flashing unlocked ROM 1.57.617.52 still ask me for unlock code when i insert anouther sim. with ATT sim work properly. never see that before. Need your ideas. in getprop [gsm.network.type]: [Unknown]. so may be need to cnange gsm.version.baseband????
Thank in advise!
You have to get an unlock code from AT&T and unlock it yourself. Flashing a rom isn't going to sim unlock your phone.
creusset said:
You have to get an unlock code from AT&T and unlock it yourself. Flashing a rom isn't going to sim unlock your phone.
Click to expand...
Click to collapse
Is unlocked ROM means unlocked GSM like Google play edition for M7? wich one ROM give me unlocked (sim free) phone?
UAALEX said:
Is unlocked ROM means unlocked GSM like Google play edition for M7? wich one ROM give me unlocked (sim free) phone?
Click to expand...
Click to collapse
There's no rom that unlocks your phone. Call att and request an unlock code.
creusset said:
There's no rom that unlocks your phone. Call att and request an unlock code.
Click to expand...
Click to collapse
i have an unlock code but...... the phone not accepted it. may be need brick it totally and then flash it. i am s-off.
Ahhh I thought you were trying to unlock the phone by flashing a rom lol. All you need to do is go back to any stock rom you want and then put the non ATT Sim in, use the unlock code, and then flash whatever other rom you want

Tmobile sim unlock + bootloader unlock to switch to Global. MSM tool will it relock the sim?

I unlocked my tmobile one plus 8t and bootloader unlock to switch to Global for the dual sim. But now i want to switch back to tmobile by using the msm tool to restore.
Will it relock sim on phone or will my phone still be unlocked after msm without doing anything?
SIM lock and unlock status are independent of the OS, so flashing between Global, T-Mobile, Chinese, India etc, will not alter the SIM lock/unlock state.

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