dear E72 user..how to totally off Edge?

I tried set it to GSM mode ady.

But smtm it pop up [E] beside the signal bar...aihz...keep absorbing money..

any solution?

but whatsapp fail in this phone..

my phone no internet plan...so i use wifi only..

but it will auto connect gprs/edge...

end up i need to delete mms access point also..