iPhone 4 GSM in USA?

[iluvifone]

-Purchased iPhone 4 on launch day in 2010, with my Canadian Carrier, Rogers
-Moving to USA next month. Want to keep my phone, ideally.
-I recall reading online that T-Mobile didn't support the iPhone 4 or something like that, back in 2010... Different frequencies or technologies were the issue, I believe.

Moving to Chicago, will I have any trouble using my iPhone with Verizon/Sprint/At&T ?

 

[Ann P]

Verizon and Sprint are CDMA networks. If your phone is already factory unlocked (I'm not familiar with international carriers), it'll only work on T-Mobile, AT&T, SimpleMobile, etc.,.

T-Mobile currently support GSM iPhone's.

 

[Mrbobb]

T-Mobile currently support GSM iPhone's.

Current and forever since their infrastructure is GSM, makes little sense to partner with a CDMA.