I'm about to upgrade my phone to 2.1 but I've never done this before. Do I leave my SIM card in the phone or take it out first? The t-mobile site doesn't give this info..??
If I do it wrong will it affect the sim card or my data?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
