Hi there, if you are talking about removing the SIM lock from the G1 to change the service provider from T-Mobile, its simple, but it costs money and also stops you being able to use Your google account and the android market !
Unlocking the G1 is very quick and easy, in fact anyone who can make a phone call can unlock their G1 with no trouble at all. Unlock-TMobileG1.com offers unlock codes for $22.99 USD. After placing an order including your IMEI code you will receive an eight-digit unlock code for your device. Your IMEI number can be found by pressing *#06# in the dialer, or by going into your settings, selecting “About phone” and then selecting “Status”. The IMEI number then can be found about half way down, it is 15 digits long.
After you receive your unlock code you insert a non-T-Mobile SIM card and the G1 will prompt for an unlock code, enter the unlock code provided to you and hit unlock. You will then know the device is unlocked with a notification that reads “Network Unlock Successful”
I wanted to unlock my G1 i recently purchased on ebay and I was not aware that its simlocked. I googled for almost half a day and I found that its impossible to unlock G1 any free method. There is many sites offering codes but most of them looked very unprofessional but at least some looked ok to me. I gave a try to FastGSM. Their service was amazing! I got code in less then 15 minutes and its price was just 20 usd. Some other sites was asking double money for same job.
When you input an incorrect simcard,
Your HTC phone will ask you for the unlock code.
Enter it and your phone is unlocked!
To get the unlock code you can find these codes on sites like
http://www.cellphoneunlock.net or http://www.cellunlocker.net
I hope that helps your guys.
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