My beautiful, wonderful Samsung Galaxy Note 2 has stopped connecting to the Internet. It was fine last night before I went to sleep but this morning it doesn't work. I'm wondering if I could have accidentally changed a vital setting in my blundering before I turned it off last night. I don't think it's the network. I am with Three but my mobile broadband connects fine. To check further ~(because I hate their support) - I installed my back-up GiffGaff sim card and have gone through all the set-up and it still doesn't work. The easy stuff I've checked One Device options (the little menu that appears when you turn it off), Data network mode is activated. Flight mode is off It is set to receive mobile data on the pull down from the top. In settings - more settings for wireless & network - mobile networks - mobile data is on. What have I missed that needs checking? Of course I've turned all the way off and on again and used restart a number of times thinking that it might be an error in the way Android is booting-up. My new sim card seems to be working fine with calls and text messages but then so did the sim from Three.