Unlocked and usable on AT&T, T-Mobile, & non-USA GSM networks?

[jdbii]

Is the Lumia 620 an unlocked phone that can be used in the USA on both AT&T and T-Mobile (and their no-contract MVNO's) as well as usable abroad and on GSM networks. Does this kind versatility even exist as an option with the smaller form factor Lumia phones (620, 521, 520)?

 

[Corepc]

620 does not support the Bands needed for T-Mobile 4g Network (would be 2g only), But does support Bands needed for AT&T 3.5g HSPA Network.

 

[jdbii]

620 does not support the Bands needed for T-Mobile 4g Network (would be 2g only), But does support Bands needed for AT&T 3.5g HSPA Network.

Would you happen to know if there are any unlocked Nokia Lumia small form factor models that would work on both AT&T and T-Mobile 3G or HSPA+ bands. (LTE not important/necssary). On Amazon would the "factory unlocked international version" meet this criteria, or as you stated in your post, would those also be limited to 2G on T-Mobile?

 

[Corepc]

521 works on both tmobile and at&t(but has to be unlocked). Tmobile will unlock after certain conditions are meant. If you can find a unlocked version of 521 that would be the best.

 

[mogelijk]

Actually, T-Mobile is in the process of refarming their 1900 Mhz bands, so cities where the refarm has been done, the 620 will get HSPA+ (4G) speeds on T-Mobile. This map shows where T-Mobile has refarmed their 1900 Mhz spectrum.

 

[metalchick719]

620 does not support the Bands needed for T-Mobile 4g Network (would be 2g only), But does support Bands needed for AT&T 3.5g HSPA Network.

Not completely true. Well, it depends on your location, of course. My mother uses a 620 on T-Mobile (we're in the NYC area) and she gets H and H+ showing on her phone all the time. I've actually yet to see it show 2G at all.