https://community.o2.co.uk/t5/Android/Samsung-Galaxy-S4-losing-connection/m-p/917757#M52309 <P>Quite a few times recently my phone has lost data connection while I've been on the mobile network. This usually happens when I've been on a wifi connection (at home or work), then gone out. Sometimes it will pick up a signal then drop it again. This keeps happening until I restart the phone, then it is ok and connects to the network without a problem.</P><P>&nbsp;</P><P>At first I thought it was the 'smart network' switch as things improved after I turned it off. However, I'm still getting the problem. It's a pain to have to keep rebooting it, as it used to work ok. I've had it nearly a year and it has only been doing this for the last few weeks.</P> Fri, 02 Oct 2015 13:12:39 GMT Anonymous 2015-10-02T13:12:39Z https://community.o2.co.uk/t5/Android/Samsung-Galaxy-S4-losing-connection/m-p/917757#M52309 <P>Quite a few times recently my phone has lost data connection while I've been on the mobile network. This usually happens when I've been on a wifi connection (at home or work), then gone out. Sometimes it will pick up a signal then drop it again. This keeps happening until I restart the phone, then it is ok and connects to the network without a problem.</P><P>&nbsp;</P><P>At first I thought it was the 'smart network' switch as things improved after I turned it off. However, I'm still getting the problem. It's a pain to have to keep rebooting it, as it used to work ok. I've had it nearly a year and it has only been doing this for the last few weeks.</P> Fri, 02 Oct 2015 13:12:39 GMT https://community.o2.co.uk/t5/Android/Samsung-Galaxy-S4-losing-connection/m-p/917757#M52309 Anonymous 2015-10-02T13:12:39Z https://community.o2.co.uk/t5/Android/Samsung-Galaxy-S4-losing-connection/m-p/917758#M52310 Try a new sim card first (just pop into any O2 shop and they'll do it for you) but if that doesn't help it may need to go in for a repair.<BR />If so, contact Samsung rather than O2. Fri, 02 Oct 2015 13:14:33 GMT https://community.o2.co.uk/t5/Android/Samsung-Galaxy-S4-losing-connection/m-p/917758#M52310 MI5 2015-10-02T13:14:33Z