Micro SIM question

212rikanmofo

macrumors 68000
Original poster
Jan 31, 2003
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I have just recently unlocked my off contract AT&T iPhone 4. I would like to test it out using a T-Mobile SIM. Do they use Micro SIM or the old standard size?

And if not, I've seen and heard that people can easily modify the SIM down to Micro size. But once it's been trimmed, you won't be able to put it back into the original t-mobile phone again? Not sure if all tmobile phones have been updated to use the micro-sim or what not so I'd like to know before I start trimming. This is just for testing my unlock, and then I'm putting the sim back to brother's phone (tmobile).
 

212rikanmofo

macrumors 68000
Original poster
Jan 31, 2003
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Since im in the US, the only other GSM carrier is T-mobile. So I'm limited. Do the newer tmobile phones use Microsims?
 

Reason077

macrumors 68020
Aug 14, 2007
2,191
681
I'm sure T-Mobile can give you a microsim if you ask for it. Some of the latest T-Mobile phones (eg Galaxy S3) certainly do use them.
 

212rikanmofo

macrumors 68000
Original poster
Jan 31, 2003
1,666
609
I'm sure T-Mobile can give you a microsim if you ask for it. Some of the latest T-Mobile phones (eg Galaxy S3) certainly do use them.
Wouldn't i need a SIM that's "activated" though? I assume that a new blank SIM card wouldn't work.
 

Sbary128

macrumors newbie
Mar 31, 2009
17
0
why not buy a noosy micro sim cutter to trimme it, and use a micro sim adapter to recover the sim to normal size ?