Does my Straight Talk phone run on Verizon, AT&T, or Sprint?
This is easy to figure out. Currently all phone’s who’s model number ends in “C” is a CMDA phone which means Verizon. If your model number ends in “G” it’s on AT&T. Currently (as of Jan 2012), all Andriod powered phones from Straight Talk run on Sprint.
Model number ends in:
C = Verizon
Android Phone: Sprint