For the last few weeks I've been having connection issues with my 3G connection on orange. Calls take 20 seconds to connect and sometimes don't connect at all. People complain that when they call me it just goes straight to answerphone. My internet keeps failing to load pages. I phoned Orange but they said there was no network issue in my area. So I tried to check my call divert setting but while loading, 90% of the time it comes up with "sim or network error". So today, I switched the phone over to 'GSM only' and it works fine. So, my question, what are the disadvantages of using 2G only?