I recently moved to a new country, and got a new SIM for use over there. The sim came with an old no-name android phone, that works fine (can use data, call, text, all).
When I insert the same sim in my iPhone 5 with iOS 7.1, it can receive calls & texts, but not make calls, send texts or use the data connection. I assume this is because it still has my old carriers settings. Pre iOS 7 there was a setting to change carrier settings, but it seems to be gone? Is it possible to go around this, with or without jailbreaking?
If it's of interest, I changed from ePlus in Germany to Softbank Prepaid in Japan.