Recently my one plus one keeps dropping connection to network. It cycles from H+ to H to no bars. I got a new sim.because the old one seemed to be scratched, but that hasn't helped. I have also tried the sim in another phone, and it has worked OK. Is there any settings I should check to make a difference?
Authentication type should be left blank in spite of what some instructions on the site say. APN settings are just for data and mms so should not affect calls & texts. Are you sure that you have roaming and data roaming enabled too?
If the sim works OK in another phone but not your opo then either there's something not configured correctly or else there's a problem with the phone. Could you try somebody else's sim from any network in you phone to see if it works?
Also switch off, take the sim out, clean it gently, reinsert it making sure that it's seated securely, switch on and search for networks and connect to 48 again in case that helps.
Couldn't find an option for roaming, under network operators I have the option to chose automatically or select an operator. Not sure which to pick here