Query about BSNL EVDO ZTE ac8710 3.1mbps - REV A card

[rajuwaste]

Hi friends,I came to know that there is new version of hardware EVDO (BSNL EVDO ZTE ac8710 3.1mbps - REV A) available.But in our area BSNL employees are showing me only ZTE ac8700 2.4mbps - REV 0.What should I do,Suppose if I buy EVDO rev A card in some other place like in chennai can I use it with old towers based on rev 0 (2.4mbps based) and other 144kpbs based towers.