I can't get a fully functioning data connection on my Galaxy S through my current SIM card. I can browse with Opera (which doesn't seem to care what the APN settings are) but nothing else works, (unless I get a wifi connection, which works fine). The problem may or may not disappear when I move countries soon (to Indonesia) but I'd like to understand what's going on. I bought it in Singapore - it's got a SingTel setup (sticker on the back, boot screen, links on home) but it's supposed to be unlocked (and SingTel say they sell them unlocked too). A guy at the Samsung service center in Singapore said it was "locked" for other countries though because they don't yet have the Galaxy S - but once phone companies have the right settings for the phone it should be fine. I used it with a different Singapore phone company (StarHub) with a data plan for a couple of days that worked fine. I browsed and used the Google Maps app, no problem. Then the problem. I came to Malaysia a week ago and bought a Maxis SIM card. At their service center they entered the APN settings (they already sell the Galaxy S), and the internet worked when I tested it on a few pages. 30 min later I tried again and got nothing, and it didn't come back. I returned to the service center, they made small changes to the settings, and it worked again... for a few minutes only. Then I discovered that I can browse in Opera - even if I use dummy APN settings (random numbers in one field and everything else blank or default). One more time I went to the Maxis service center. The person at the counter noted the severe lag and suggested there was something wrong with the software.* (Actually I had about 4 different browsers running, to see which ones worked.) He restarted the phone, asked me to force close some apps (e.g. NimBuzz and maps, which had started automatically). And... suddenly I had data access! This lasted a couple of hours, while my battery lasted. However after I restarted the phone again, I couldn't repeat the success. I stopped unneeded apps, I uninstalled NimBuzz, I tried restarting over and over... but I get no connection other than with Opera. I've tried other internet apps (Maps, sync in GTasks, OkCupid, NimBuzz) and none work. Any clues as to what's going on? Thanks. * I now only get small lagging, since I followed the advice on another thread - I removed the Daily Briefing and Google search apps from the home screen, and regularly check running apps. (I exit apps properly when possible.) But this hasn't helped the data connection.