Gionee A1 have a big broblem for net speed. I check my sim change lots of time no speed in my phone and my friend phone gionee A1 on speed test ok kala app such as big shok I know. that was foolish handset manufacturing net problem. so big net problem gionee A1 but just change your handset. there is no option. I got same problem, and I went to service centre then they upgrade and install the software but no use. then I returned and took lack one more device. and I don’t want to buy gionee brand anymore.