I have had the Vodafone sim a little under a month and at first worked fine, however now it always says 'searching' and I can't get signal/data anywhere! I've tried turning my flight mode off/on, turning the phone off/on and resetting network settings. This is been happening for about a week. It started working this morning for about 20mins and now has gone back to'searching'. It's an iPhone 6. Help me!!