Iphone on tmobile plan?

[#1 Mustang Fan]

configure iPhone for T-mobile internet:
http://forums.t-mobile.com/t5/Non-T-Mobile-Devices/How-to-Configure-Iphone-Internet-to-Work-on-T-mobile/m-p/66349/highlight/true#M2751


It may not be possible to unlock it until the after the release of 4.0 this summer. Try the links below, they will guide you thru to the correct programs needed for your particular firmware/bootloader combination if it is possible:

http://www.iclarified.com/entry/index.php?enid=8603

http://www.jailbreakmatrix.com/

http://www.redmondpie.com/iphone-3.1.3-baseband-05.12.01-unlock-exploit-found/


Before you do anything it is recommended that you backup your SHSH Blobs for future requirements:

How to Backup SHSH Blobs for iPhone using firmware Umbrella (Windows):
http://www.iclarified.com/entry/index.php?enid=9194

How to Backup SHSH Blobs for iPhone using firmware Umbrella (Mac):
http://www.iclarified.com/entry/index.php?enid=9189

How to find your iPhone ECID (Windows):
http://www.iclarified.com/entry/index.php?enid=9192


How to downgrade 3.1.3:
http://www.saurik.com/id/12#howto

http://www.blogsdna.com/7070/downgrade-iphone-os-3-1-3-baseband-05-12-01-to-3-1-2-using-fuzzyband.htm

http://www.blackra1n.biz/category/downgrade/

[Camille]

So I'm thinking about buying an iphone on ebay. and unlocking it myself. Right now i have the G1 on Tmobile, so if i just switched my sim cards, would i have any problems or complications? also, would the internet and applications work? Thanks!