Hello guys as I am currently using a Micromax Canvas Tab P702 so I am facing a very serious issue which is of calling the main need of Phone/Tab likd I said the problem which I am facing is like when I will try to make calls in this tab it just says that UNABLE TO ESTABLISH CALLS where my network bar is always full and there is no problem in my simcards but this problem is arrived just now after 3months I bought so I am very nervous to buy this because I need a calling feature I complained to Micromax Service Center them about this issues my mails are still not replied around 10 days would have gone and whenever I call to them they listen to my problem and after a minute they cut my call they do such a great cheating in a systematic manner that everyone gets fooled so guys have a look over my review before buying Micromax Canvas Tab P702 Thank You.