e1731

I am confused to choose between two. e3131 @1950 attracting feature is 21 mbps airtel e1731 @1200 -7.2 mbps I resides in North U.P near delhi and want to purchase a datacard according to scope of 4g in future.however someone suggested me to pick airtel because in future there would be good...

I hv a android tablet which support 3g usb modem pls suggest me which one to go for Huawei e220 or Huawei e1731??