Andriod 2.3.5 in Micromax A27 restore to factory settings

A

AC Question

I have purchased Micromax A27 one year back.

Recently, I reseted the phone to factory settings. (Settings --> privacy --> Factory Data Reset).

it brought the mobile to new mobile state. now when i try to install any app, it will show that is is downloading. but a single bit of data is downloaded. The problem is also with browser. it is unable to open any webpage. But i am able to see the mails (by Gmail App). whenever a new mail arrives, it is showing that mail.

What are the updates I need to make?