GSM and CDMA are two types of cellphone networks in the US. For the most part if you have a phone on one network you can’t use it on the other.
US Mobile currently only operates as a GSM network. What does that mean? Well GSM networks like US Mobile, T-Mobile, and AT&T use removable SIM cards (like the ones we sell here). This means that unlocked phones from other American GSM carriers will work on US Mobile’s network. (Check here for compatibility information.)
On the other hand, Verizon and Sprint are CDMA carriers. CDMA carriers don’t use SIM cards and most CDMA phones are locked into their network. So you can’t use a Sprint phone on Verizon’s network or vice versa. Also, many CDMA carriers don’t allow you to do voice and data at the same time. However, CDMA networks tend to have better network coverage in rural areas.
Advantages of GSM Networks
- Easier to switch phones
- Easier to switch carriers
- If you travel abroad you can switch your SIM card for a local SIM (just don’t forget to Snooze your US Mobile plan first)
If you’re planning on bringing your GSM phone to US Mobile you can find more information in Is My Phone Unlocked. Can I Bring It To Any Network?. Or if you’re looking for a new phone, check out our selection.