sprint
Yes. The Iusacel company uses CDMA; the rest use GSM.
No. Colombia uses GSM. Boost blackberry is CDMA.
yes you can change gsm to cdma via mnp.
Unlocking usually refers to a GSM network and flashing usually refers to CDMA networks. When you unlock a phone you can use it on any carrier that uses the same radio (GSM/CDMA), or if you have a world phone, either a GSM or CDMA. Flashing the phone just allows you to use one specific CDMA carrier.
Comcast operates as a mobile virtual network operator (MVNO) and primarily uses Verizon's network, which is based on CDMA technology. However, Comcast also supports GSM-based services through partnerships with other networks. Therefore, while Comcast itself is not strictly GSM or CDMA, it utilizes the CDMA network for its mobile services.
No. Colombia uses GSM. Boost blackberry is CDMA.
gsm
No. Cricket uses a CDMA network and T-Mobile uses a GSM network.
CDMA, offers better data transfer
GSM = Global System for Mobile communications. CDMA = Code Division Multiple Access.
Gsm
No Alltel uses CDMA and sim cards is GSM