I recently unlocked my HTC from Sprint network in the US but I can only use 2g. The phone is 3g and 4g enabled but when I set them in network mode, I lose network. From my findings, the bands sprint put on the phone are not compatible with 3g bands in Nigeria. Please I need someone to guide me on how to flash additional bands or whatever it is I can do. The phone has a Qualcomm processor and has a 6.0 os. Thank you in advance