Is Nokia C5-00 sufficient for internet banking? How and why?

Yes. It is. Its top gprs speed is 236 kbps and over edge it is 298 kbps. While in other most of sets gprs speed is 100 kbps and edge remains same. It has 3.5G technology for higher data transmission upto 10.2 mbps and uploading speed is 2 mbps. Only demerit is lack of wifi.