Got the SIII on Saturday on a Vodafone contract, having previously been on O2. Arranged with Vodafone to have O2 number migrated over and was told to switch phone off between 1100 and 1600 hours today. I used the O2 sim card in the phone with no problems up until today, texting, calling, internet, no dramas whatsoever. Switched off and removed sim card at 1050 this morning, re-inserted and switched on at 1600... nothing. Called Vodafone who advised me to switch off until 2000hrs. At that time, I also noticed a new symbol appear on the screen in the top left corner, where an envelope appears if you have received a text message, like a house shape on it's side. Switched back on again at 2000hrs, still nothing. Contacted Vodafone online support who advised a soft reset, switch off, remove sim card, wait 30 seconds, re-insert and switch on. Now I can make phonecalls, but still can't receive or send texts or access internet. I have checked the message centre number is correct and all settings are as they should be. Still had above symbol on phone, google is not being very friendly as I can't find anything relating to this symbol and the phone's manual doesn't show it. Whilst typing this, I've tried yet another soft reset. The symbol has now disappeared, still can't text or access internet though. Can anyone advise? Vodafone's tech support ever so helpfully closes at 2000hrs until 0800 but I'd like to get this sorted before then if possible.