Why is one corner of a SIM card cut: Discover the secret behind its shape

The cut corner on a SIM card serves a crucial practical purpose: ensuring correct orientation and preventing damage to the ...
Gizmodo

T-Mobile Is Offering Micro SIM Cards So Their Customers Can Use the iPhone 4

In order to use the iPhone 4 on T-Mobile you have to jailbreak it, unlock it and then annoyingly cut your fatty SIM into a Micro SIM. Annoying! T-Mobile is making it a little easier by giving Micro ...