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So, can someone explain to me how the GSM world works with phone swapping?

Literally all I have to do is insert my SIM card in a new phone, and I can use it like normal?
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Sent from my HTC Supersonic.

If the phone is unlocked yes, if not no, but its not to hard unlocking your phone.
Sent from my GT-P1000 using XDA App

Macktv said:
If the phone is unlocked yes, if not no, but its not to hard unlocking your phone.
Sent from my GT-P1000 using XDA App
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Click to collapse
So how do you know if it is unlocked? Is that like a clean ESN for CDMA phones? If you buy a phone on contract, is it automatically locked until the contract is up?
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Sent from my HTC Supersonic.

If you are buying a phone that is sold by a USA Carrier its got about a 95% is LOCKED. You will know when you put the sim in, if you get ERROR SIM LOCKED, Please Enter Unlock Code, it's locked. Otherwise if it lets you into the phone your golden. Locked/Unlocked is not even close to ESN being clear/bad. Just means carriers have the phone locked to them, you can buy an unlock code for almost any GSM phone for $20 or less

So the lock is just specific to a carrier and not a user?
--
Sent from my HTC Supersonic.

Correct. So that you have to come to them to get that specific phone

Some phones can be unlocked via tools you can find here on XDA other phones require some bigger equipment and you typically have to go on ebay or a similar site to get your unlock code based on your IMEI number

How to enter subsidy unlock code on G2x without an unsupported sim?

Hello, I got an unlock code for my g2x through tmobile, and the instructions say to boot it up with a non-Tmobile sim inserted. Does anyone know how to get to unlock input screen without a non-Tmobile sim available? thank you for your time.
(I read some people advised to dial #073887* to bring up the screen,but no luck. I guess this is for att phone only?)

I can't remember off hand but a google search can find it, it is same process as the O2x. However when I tried to enter my unlock code with the T-Mobile SIM in it, it didn't work. I needed a non T-Mobile SIM for it to work.
Sent from my LG-P999 using Tapatalk

Try this method
http://www.lg-phones.org/how-to-unlock-the-lg-optimus-gt540.html
it worked with my Optimus T and I am sure it will work with G2x as well (but I have to wait for a couple of months for free unlocked code from T-Mobile).
note:
you MUST input from dialer
2945#*999#
while #*999# is G2x model number (P999)

do have have to replace "540" to "999"? I think i just going to ask someone to let me an att simcard (All my family and friends are using tmobile/sprint....it's hard to get an att simcard for me....*sigh*)

jdaclutch said:
do have have to replace "540" to "999"? I think i just going to ask someone to let me an att simcard (All my family and friends are using tmobile/sprint....it's hard to get an att simcard for me....*sigh*)
Click to expand...
Click to collapse
Yes, you MUST use 999 instead of 540 because #*xxx# is your phone model.

[Q] so i got my free sim card unlock code but

i cant find anyone with a micro sim card to put it in my phone lol i forget this phone has the micro sim card for whatever reason. can i just get one somewhere for free or something? my mom and grandma have at&t but idk if they will give them one for free. i just wanna make sure the sim unlock code works that tmobile gave me lol

The phone comes with one. What happened to it? You can also buy them on Amazon if you need to.
Sent from my Kindle Fire using xda premium

Droidificator said:
The phone comes with one. What happened to it? You can also buy them on Amazon if you need to.
Sent from my Kindle Fire using xda premium
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well i need an at&t micro sim card so i can boot up my phone and it will ask me to enter the unlock code that tmobile provided me so i can use my phone for at&t now.

Get a sim card cutter and adapter from amazon/ebay. they are like 2 bucks.

Use a sim cutter to make it into a micro sim. Or if you want to risk cutting it yourself then you can do it too. I did that with my t-mobile sim card and cut it with a pair of scissors . Why would you use the One S on AT&T when you can get the One X running on their network. I am a little confused what you are trying to do though

cut it yourself or go onto the carrier website and order one
here in the UK the sim cards are free

azzledazzle said:
cut it yourself or go onto the carrier website and order one
here in the UK the sim cards are free
Click to expand...
Click to collapse
Yeah I cut my regular t mobile card to fit haha but I have the new one as back up I used it to cut my old one seems to work well
Sent from my HTC One S using xda premium

Jin486 said:
Use a sim cutter to make it into a micro sim. Or if you want to risk cutting it yourself then you can do it too. I did that with my t-mobile sim card and cut it with a pair of scissors . Why would you use the One S on AT&T when you can get the One X running on their network. I am a little confused what you are trying to do though
Click to expand...
Click to collapse
I want to unlock it so if my mom and grandma get there phones fixed if they ever need to I can let them borrow my phone to use. Plus I want them to use my phone since I'm trying to talk them into buying the one x.
Sent From My HTC One S Using XDA Premium App

s10shane said:
I want to unlock it so if my mom and grandma get there phones fixed if they ever need to I can let them borrow my phone to use. Plus I want them to use my phone since I'm trying to talk them into buying the one x.
Sent From My HTC One S Using XDA Premium App
Click to expand...
Click to collapse
Amazon sells AT&T pre paid sims, but you'll probably end up having to buy some minutes with it. But, then at least you can verify it works once unlocked.
Sent from my Kindle Fire using xda premium

I'm on a TMO plan. I got an unlock code, went on ebay and got an AT&T micro sim for $3 shipped. Swapped sims and entered unlock code. Removed the AT&T sim and reinserted the TMO sim.

elbee222 said:
I'm on a TMO plan. I got an unlock code, went on ebay and got an AT&T micro sim for $3 shipped. Swapped sims and entered unlock code. Removed the AT&T sim and reinserted the TMO sim.
Click to expand...
Click to collapse
Sweet. I might have to do that. Thanks for that info
Sent From My HTC One S Using XDA Premium App

Could anyone who has used an unlock code to successfully unlock their phone take a look at this thread and see if you can help?
We are close to getting a free sim unlock hack for all but need a few contributors for testing purposes.
Thanks!

which website to carrier unlock LG p925g?

Hey everyone,
A friend from canada just gave me his old p925g phone that is locked on rogers and I've been looking online but there doesn't seem to be a free way to sim unlock this phone. Many people seem to have had some success unlocking this phone through some websites by paying and I was wondering if you guys could share which website you used?
There are many websites just by googling this, but I've never used this kind of service and I'm quite sure many websites are scams so I was hoping someone here could confirm a successful unlock with the name of the service used.
Thanks!

http://www.ebay.com/itm/UNLOCK-CODE-FOR-ROGERS-LG-OPTIMUS-3D-P925G-/140740291636?pt=PDA_Accessories&hash=item20c4c66c34#ht_1462wt_1397
There was a cheaper service but couldn't find.

@arsen4oo
Thanks for the link, cheaper then $1.99?? this price is already good for me!
Have you personally used this? How did it go? you bought this and then they sent you a letter to your home with the unlock code?

I'll look for the link and post it, I already tried a Site and it took no more than 5mins to receive the code via email.
Sent from my LG-P920 using xda premium

longlife_01 said:
@arsen4oo
Thanks for the link, cheaper then $1.99?? this price is already good for me!
Have you personally used this? How did it go? you bought this and then they sent you a letter to your home with the unlock code?
Click to expand...
Click to collapse
you send them your IMEI then you get unlock code to your e-mail or ebay messages.

@oyanezg any luck finding the link?

longlife_01 said:
@oyanezg any luck finding the link?
Click to expand...
Click to collapse
I found it is :
http://sim-unlock.net/
They sent me the code in less than 15mins
Goodluck.
Sent from my LG-P920 using xda premium

@oyanezg
Thanks for the link!
I still have one more question, I saw this on the website: "You will also need a sim card from the network that are currently mobile phone is working. Sim card will be needed when you will entering unlock code to Your phone."
Did you use it to unlock? I'm in France and I don't have the sim card. My friend cancelled his plan at rogers and now lives in japan so there's no way to get the sim card.

Well what it means is that you need a sim that actually works when inserting the code. I used the sim that worked typed the code then my phone was ready to accept any sim card.
Sent from my LG-P920 using xda premium

well... it seems like i wont be able to unlock it then, being in france its gonna be hard to find anyone that has a rogers sim card...
thanx for the help!
Sent from my Nexus 7 using xda app-developers app

@longlife_01
You don't need Rogers sim card to unlock Rogers phone when inserting the code. You're supposed to use non-Rogers sim to get that locked screen to insert the code. And I don't think you need a working sim to unlock, as long as not a Rogers sim. I used one my old overseas sim from asia trip to unlocked my rogers phone

longlife_01 said:
well... it seems like i wont be able to unlock it then, being in france its gonna be hard to find anyone that has a rogers sim card...
thanx for the help!
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
You can always order a sim card from canada.

Rogers Unlocking Help Requested

Hi there,
I recently bought a cheap Rogers HTC One X in mint condition off my local classifieds ($300). It is locked to Rogers and I need to use it on Telus. What is the best way to unlock it? Is there any way to unlock it for free? I am not experienced at all with Android, I'm coming from an iPhone but would really like to get this working because I'd love to get rid of it and just use my One X.
Please help

No free options yet. You would have to buy an unlock code online
Sent from my HTC One X using xda app-developers app

Or you could just go.to the carriers store ans get it unlocked. Tell then you have family over seas and you're buying it as a birthday present. Most of the carriers will unlock it for free.
Sent from my HTC One XL cellular device over clocked to 1.9Ghz

Canadian carriers won't unlock phones
Sent from my HTC One X using xda app-developers app

area51avenger said:
Canadian carriers won't unlock phones
Sent from my HTC One X using xda app-developers app
Click to expand...
Click to collapse
Actually after an amount of time with good standing they are these days.
Though one like Telus charges 50, so its not worth it versus a few bucks online.
WR
Sent by WR's One XL

Will using an unlock code permanently unlock the phone? Also, will the unlock be removed by changing ROMs, unlocking the bootloader, etc? Is the unlock code a one-time use kind of thing? How do they even get these unlock codes?

LiquidNitrogen said:
Will using an unlock code permanently unlock the phone? Also, will the unlock be removed by changing ROMs, unlocking the bootloader, etc? Is the unlock code a one-time use kind of thing? How do they even get these unlock codes?
Click to expand...
Click to collapse
Unlocking your phone unlocks the branding on your phone. Like if you have AT&T and you put as T-Mobile SIM card in, it won't work. If it was unlocked and you did that, it would work.
If you changed your Rom, no. Each phone has their own imei number, therefore it only has one unlock code. As for it being a one time use, no. And if you unlocked your bootloader, no.
The unlock code will perm unlock your phone so you can use it internationally and with different carriers as long as they use SIM cards(and if that card fits in your phone).
Sent from my HTC One XL cellular device over clocked to 1.9Ghz

Thanks everyone for the replies so far, I really appreciate it! :good: I have only a few last questions before my problem is resolved:
1.) Where is the best place/website to get an unlock code from (in terms of price, success, etc) ?
2.) How do I enter in the unlock code into my phone?

LiquidNitrogen said:
Thanks everyone for the replies so far, I really appreciate it! :good: I have only a few last questions before my problem is resolved:
1.) Where is the best place/website to get an unlock code from (in terms of price, success, etc) ?
2.) How do I enter in the unlock code into my phone?
Click to expand...
Click to collapse
I would try and tell you but, I have never done it and I don't want to be the one to send you down the wrong path and something go wrong.