I am using idea sim since 3 year for my personal use. it have good network in my area for using 3g and 2g both. I using idea mainly for geting high speed internet using 3g mode. starting I used this for making calls and browsing internet with hight speed and I have not got any major problem using this network. the calling offers in prepaid are very good and the rates are not too much high. idea network coverage area is very large. thanks for good service. I am says only word of idea. WHAT N IDEA SIR JI