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what happen if unlocked phone is rooted and upgrade to custom rom

i buy the phone HTC DREAM from the internet (i'm from malaysia) so i don't have T MOBILE SIM, but it's already unlocked.
what happen if i rooted or flash the phone with custom rom such as JACHeroski and etc.
will the phone become locked again ??
if the phone is locked, can i still able to like root and flash the phone ??
a rooted phone with custom rom, can eliminate the unlocking process ???
thx in advance
sorry for my poor english

keatliang2005 said:
i buy the phone HTC DREAM from the internet (i'm from malaysia) so i don't have T MOBILE SIM, but it's already unlocked.
what happen if i rooted or flash the phone with custom rom such as JACHeroski and etc.
will the phone become locked again ??
if the phone is locked, can i still able to like root and flash the phone ??
a rooted phone with custom rom, can eliminate the unlocking process ???
thx in advance
sorry for my poor english
Click to expand...
Click to collapse
No. A custom ROM wouldn't lock or unlock the phone. It can be unlocked for any SIM and still be stock firmware, it can also be unlocked for any SIM and have a custom rom.
The two things are completely different.
Hope this helps.

You can do whatever you want to any rom, and that won't affect anything that makes it unlocked

thx for replying,
so meaning, currently the phone is unlocked, and i downgrade to RC29
so it wont be locked again ?
because need to downgrade to root-ed the firmware....

is this mean, downgrade my unlocked phone firmware to RC29
in the process, it will not reset my phone from unlock back to lock status ??
if it will not make my phone locked back again during the process
and i success downgrade to RC29 i can gain root access, then i can update to custom firmware
so another question, in the upgrading process (flasing to custom firmware or cupcake 1.5) will it set back from unlock to locked ??
sorry for my bad english
appreciate for replying, i need to know before i done anything
in the process,

Hi. I also have an unlocked phone. It was unlocked prior I downgraded it, and flashed new custom roms, and it is still unlocked. As the others said no need to worry, if i'm right the locking thing is in deeper level. Of course everything you do with your phone is your responsibility.

eami said:
Hi. I also have an unlocked phone. It was unlocked prior I downgraded it, and flashed new custom roms, and it is still unlocked. As the others said no need to worry, if i'm right the locking thing is in deeper level. Of course everything you do with your phone is your responsibility.
Click to expand...
Click to collapse
thx for the reply, now i can do the firmware flashing

unlock after root?
NPerry said:
No. A custom ROM wouldn't lock or unlock the phone. It can be unlocked for any SIM and still be stock firmware, it can also be unlocked for any SIM and have a custom rom.
The two things are completely different.
Hope this helps.
Click to expand...
Click to collapse
Can T-mobile still unlock the phone after I rooted it or would they know that I put a custom rom on it??

c_licious said:
Can T-mobile still unlock the phone after I rooted it or would they know that I put a custom rom on it??
Click to expand...
Click to collapse
Yes, you can still unlock it through T-Mo. No one at T-Mo needs to have physical access to your phone, they can give you an unlock code over the phone.

c_licious said:
Can T-mobile still unlock the phone after I rooted it or would they know that I put a custom rom on it??
Click to expand...
Click to collapse
One has nothing to do with the other. ROMs have nothing to do with the SIM cards and SIM cards have nothing to do with ROMs. T-Mobile isn't going to come to your house and spank you for having a custom ROM because they "know"

DirectMatrix said:
One has nothing to do with the other. ROMs have nothing to do with the SIM cards and SIM cards have nothing to do with ROMs. T-Mobile isn't going to come to your house and spank you for having a custom ROM because they "know"
Click to expand...
Click to collapse
Hmm highly unfortunate. Wouldn't have minded a little love tap from Cindy with Customer Service LOL
Thanks buddy!

Why unlocking befor flashing?

I want to flash my samsung with the newest firmware from "samsung-firmwares",
but why i have to remove before my simlock (it´s a branded from A1).
And what happens if I flash without removing the simlock?
Thanks.

I also have the same question on my thread, no body seems to know if we can really flash simlocked units.

errors on boot i suppose ?

So Android phones actually combine simlock with different firmware locking (CID lock?) ??
The hell with that, then. In any other phone we can flash the firmware without the worry about simlock.

i rooted mine and it is sim-locked. never tried to flash tho.
just chiming in that we need some sort of confirmation/assurance that flashing is/ain't possible.

boredtoday said:
i rooted mine and it is sim-locked. never tried to flash tho.
just chiming in that we need some sort of confirmation/assurance that flashing is/ain't possible.
Click to expand...
Click to collapse
i got the same qeustion, mine is root as wel but can some1 confirm that we can flash the phone when its locked?
and is there a way to check if your phone is simlocked??

Mine is SIM lock (i think, never tested) because it was A1/Vodafone branded when i bought it..
After flash the brand was gone, but dunno with the simlock, as i have A1...

you can flash a locked phone without any problem. it will stay locked though after reflashing. if you flash a generic firmware you will get rid of the carrier personalisation.

Ismy phone still unlocked after flashing ICS rom??

I unlocked my phone while it was on 2.2 using glaxy s unlock app from market.The other day i flashed ICSSGS RC4.1 rom and it changed my IMEI. Is my phone still unlocked?? I checked the rom's zip file and it doesnt contain efs folder which should mean that it didnt overwrite efs folder that contains unlock data. So my phone shouldnt be relocked right (i hope not because i need to use it in Europe in couple weeks ) ???

I'm interested in the answer to this as well. I unlocked mine whilst in gingerbread....but now that i have upgraded to ICS....is my phone still unlocked? I don't think my IMEI changed though....

I unlocked mine in froyo and its still unlocked..I am on ICS now....

i flashed ics and had to "re unlockb
Sent from my SGH-I897 using xda premium

Typically, once unlocked, always unlocked.

ptesmoke said:
i flashed ics and had to "re unlockb
Sent from my SGH-I897 using xda premium
Click to expand...
Click to collapse
What ROM did u flashed, and how did u reunlock it ??

im pretty sure it was flashing back to stock gb and doing a master clear that caused it. i just downloaded the galaxy s unlock app from the market and re ran the unlock...
Sent from my SGH-I897 using xda premium

viny2cool said:
I unlocked mine in froyo and its still unlocked..I am on ICS now....
Click to expand...
Click to collapse
Interesting. I unlocked mine in GB and updated to ICS over the weekend. Wanting to order up a straight talk sim and try it. I did verify that my IMEI matches what it is supposed to be. Hopefully it remains unlocked. I guess worse case is I have to drop back to 2.3.
Have yet to find a *# combo that will show you the lock status in ICS.

Did it change your IMEI back to 04999...whatever. If so, flash again because that is the default IMEI, mine did that before and I just reflashed from a stock oneclick. I think it somehow doesn't read the IMEI correctly sometimes. You might try one clicking back to GB(without bootloaders if you've already got them) and then diagnose from there.

Whenever I flash back to stock using odin, it relocks. But I have my code handy.

I ordered and installed a Straight Talk 'AT&T' sim this week. Everything is working as it should. I did check the hex code and the unlock bit was set, however, I have heard that the ST sim cards are unlocked so you don't necessarily need an unlocked phone. It doesn't really verify that I'm still unlocked, but I thought I would mention that in my case, I had no problems.

Problem with unlock and EFS Folder

Hi i bought an Simlocked S3 Mini with crashed LCD.
Then i repaired it and flashed new Stock rom for provider A1 from Austria over it. Then i saw the Pre Rooted Rom i flashed it and Rootet my phone.
Then i wanted to unlock it via the Service menu but no Network lock Menu was there. So i flashed Dmod rom and hoped it will be unlocked, because in my galaxy note i only flashed pre rootet rom did Triangle away and flashed a Custom rom and had no simlock. Same on the htc Desire from my girlfriend, after flashing Custom rom no simlock. But s3 mini flashing custom rom simlock stayed.
Now i looked for the nv_data.bin method did not work then i wanted to make it with the nv_core.bak but in my efs folder there is no file named like that?!
What can i do? i have no warranty on this phone. i mean real warranty ^^ because i bought it. i can use it only with a1 sim.
Thx for help or other instructions. greetz tom

Have you tried to flash other official firmware throught ODIN?

Yes i flashed Stock Roms with odin to geht the EFS folder rebuild but always same. i flashed the DBT Germany Rom the Open Austria rom then the Stock Provider rom nothing.. what can i do now?
mfg Tom

Antoz1103 said:
Hi i bought an Simlocked S3 Mini with crashed LCD.
Then i repaired it and flashed new Stock rom for provider A1 from Austria over it. Then i saw the Pre Rooted Rom i flashed it and Rootet my phone.
Then i wanted to unlock it via the Service menu but no Network lock Menu was there. So i flashed Dmod rom and hoped it will be unlocked, because in my galaxy note i only flashed pre rootet rom did Triangle away and flashed a Custom rom and had no simlock. Same on the htc Desire from my girlfriend, after flashing Custom rom no simlock. But s3 mini flashing custom rom simlock stayed.
Now i looked for the nv_data.bin method did not work then i wanted to make it with the nv_core.bak but in my efs folder there is no file named like that?!http://forum.xda-developers.com/newreply.php?do=newreply&p=41190752
What can i do? i have no warranty on this phone. i mean real warranty ^^ because i bought it. i can use it only with a1 sim.
Thx for help or other instructions. greetz tom
Click to expand...
Click to collapse
Unlock via IMEI or Unlock Box.
you can also try this option: http://forum.xda-developers.com/showthread.php?t=2082626

What u mean with unlock via imei how that work?
The method i tried and i dont have the network lock menu there shows not active up.

Antoz1103 said:
What u mean with unlock via imei how that work?
The method i tried and i dont have the network lock menu there shows not active up.
Click to expand...
Click to collapse
its pay in some dedicate web for your network unlock code.

Ah like on Sammobile? i choose model and type in the imdi number and then get the unlock code? then i have to put in another Sim and when network lock pops up i give that code in therE? is that then a Permanent unlock or will i loose the unlock after flashing a new rom or making a Factory Reset?
Hope u can answer this Question.
Greetz

Antoz1103 said:
Ah like on Sammobile? i choose model and type in the imdi number and then get the unlock code? then i have to put in another Sim and when network lock pops up i give that code in therE? is that then a Permanent unlock or will i loose the unlock after flashing a new rom or making a Factory Reset?
Hope u can answer this Question.
Greetz
Click to expand...
Click to collapse
Its permanent unlock.

Ok then i will try the unlock will be saved to in efs folder? or how that work? because i unlock and then i will save the efs for having ever unlocked phone

Antoz1103 said:
Hi i bought an Simlocked S3 Mini with crashed LCD.
Then i repaired it and flashed new Stock rom for provider A1 from Austria over it. Then i saw the Pre Rooted Rom i flashed it and Rootet my phone.
Then i wanted to unlock it via the Service menu but no Network lock Menu was there. So i flashed Dmod rom and hoped it will be unlocked, because in my galaxy note i only flashed pre rootet rom did Triangle away and flashed a Custom rom and had no simlock. Same on the htc Desire from my girlfriend, after flashing Custom rom no simlock. But s3 mini flashing custom rom simlock stayed.
Now i looked for the nv_data.bin method did not work then i wanted to make it with the nv_core.bak but in my efs folder there is no file named like that?!
What can i do? i have no warranty on this phone. i mean real warranty ^^ because i bought it. i can use it only with a1 sim.
Thx for help or other instructions. greetz tom
Click to expand...
Click to collapse
The FIRST thing you have to do after anything is to backup your EFS folder...

I did. Yesterday i then shut down phone. it shuttet down in split second and then today i wanted to start it but nothing happened.
I cant start it and no recovery and no download mode. if i plug it in to a/c nothing. nice ****ing bricked phone.
first phone which is bricked for me....... man or is it only a security shutdown?
mfg tom

Help needed unlock

Hello
I have unlocked my s6 by using the metro pcs firmware upgrade method .
I have reflashed the t mobile deoxed version rom .
All was working fine until few hours ago when my phone stopped receiving network .
Reboot didnt work too until i switched on wifi back on .
Is it something to really worry about ?
One more queery: once i unlocked my phone does it mean its permanently unlocked to any network because right now im residing in asia .

younussm said:
Hello
I have unlocked my s6 by using the metro pcs firmware upgrade method .
I have reflashed the t mobile deoxed version rom .
All was working fine until few hours ago when my phone stopped receiving network .
Reboot didnt work too until i switched on wifi back on .
Is it something to really worry about ?
One more queery: once i unlocked my phone does it mean its permanently unlocked to any network because right now im residing in asia .
Click to expand...
Click to collapse
I think both questions have the same answer, you can't use any other firmware other than metro pcs. I remember seeing that in a different thread. If you paid it off free and clear call tmobile and they should permanently unlock it for free. I think all you need is your imei or serial number.

So can i reflash the metro pcs firmware and still have the device unlocked ?
I have purchased the unlock code off one of the leading sites on web.

I called T-mobile and pestered the hell out of them and they in return pestered the hell out me, in the end I have an unlocked phone with no flashing this and that.

younussm said:
So can i reflash the metro pcs firmware and still have the device unlocked ?
I have purchased the unlock code off one of the leading sites on web.
Click to expand...
Click to collapse
I can't give you a answer but why not call tmobile like ipaq_101 did? That way you don't need to care what firmware or rom your on, it will be universally unlocked. If long distance calling is a issue you can use the online help, just make sure the first rep you talk to knows you won't stop bothering them until it's unlocked.

Is it not possible to install a ROM and then, say, flash a MetroPCS modem or something? For the record, I'm in the same predicament; I'd like to flash a ROM, but am running stock MetroPCS firmware that allowed me to use an unlock code.
Sent from my Nexus 7 using Tapatalk

phobia09 said:
Is it not possible to install a ROM and then, say, flash a MetroPCS modem or something? For the record, I'm in the same predicament; I'd like to flash a ROM, but am running stock MetroPCS firmware that allowed me to use an unlock code.
Click to expand...
Click to collapse
You can flash any compatible ROM. I Odin flashed the MetroPCS firmware only so that I could permanently unlock the SIM. (I found that the T-Mobile Device Unlock is buggy and not exactly permanent). Then I flashed the international "F" version of Alliance ROM along with UniKernel. Been working great!
As long as you don't ever flash a T-Mobile radio, you'll stay unlocked!