Report "Nokia 5300 ii have a nokia 5300 phone and ii find that my phone suddenly restarts off by itself ii cannot go into my inbox, outbox, saved items and also sent items and also ii cannot sent any messages at all last and most its that the buttons for the numbers did not light up ii dont know why its my hp or my SIM card problem?? please tell me the solution to it and if it is helpless can you tell me how much does it cost to repair the phone thx you =)"