Samsung Galaxy SII Mssg notification tone is not there

[ANUSHKA]

Hi I have a Samsung Galaxy SII recently the mother board had crashed all on it s own and I had to replace it. Fortunately the phone was under warranty, but I lost all data

My phone got upgraded to ICS. All was well for a week, now wht has happened is , that the phone hangs, most apps I open, hang and all though all messages are read it shows unread 1, also the message notification sound has gone although I receive notification sound for all the other things, like whtsapp, gmail, gtalk etc.

No problem existed in the Gingerbread before the phone got upgraded. It scares me tht the phone will conk of again.

Please help!!

[greenman]

Freezing is a common problem when going from Gingerbread to ICS without carrying out a Factory reset. You can do this now, but backup first as data and contacts can be lost, although photo's will not be touched.