What kind of SIM do I use for my iPhone?

Sal

Member
Jun 1, 2008
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I unlocked my phone months ago and have been using a tmobile one. I get bad signal here and there. I read that its probably due to the type of sim card I got from the store. I just asked for a SIM, nothing special. I dont know what kind of SIM the iphone came with so I dont know what to ask for. What kind of simc card do I ask for when I go to the t-mobile store?
I was able to snag this off of the apple site.

GSM/EDGE (850, 900, 1800, 1900 MHz)

Its something about GSM so Im guessing it could help me with getting the right SIM Card.
 
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