answered
2017-10-09 12:48:28 +0200
I have this issue sometimes as well, both home and abroad.
HOME NETWORK
Last time enabling data gave me error "problem with connection" instead of "Connected". Ofono logger gave me "unexpected data call status 65535". I contacted the service provider and they "did something" to fix the issue. I was told it had something to do with "GPRS data not been updated correctly", anyway that solved the problem.
Another time when facing the same problem I also contacted the service provider and they asked me to "reboot the network connections", I did this from Utilities app and problem was solved. They said that iPhones have had the same problem. I can't tell if service provider also did something or not.
ABROAD / ROAMING
Usually I am able to connect and use data but connection is lost after a few days, reconnecting never happens. This was solved by my colleague: "set network manually, do not let the phone select carrier". He had two iPhones in the family: other worked fine abroad, other required the same maneuver. I am not familiar with network selection procedure but I assume network strength was not stable and phone decided to move to stronger network. Experts can correct me.
POSTSCRIPT
I mentioned rival twice, so it is not a Sailfish problem only!
Helpdesk and IT support personnel do not know Sailfish that well, they may surrender instantly or blame OS. For that reason it is important to ask them what was done to solve the situation.
@u-dash
Occasionally, I have problems with 4G here in the UK (Giffgaff).
Head to Settings/Mobile network and tap on
Network mode
: and change toPrefer 3G
, give it a second or two and you should be connected to 3G. If all goes well with connection to 3G, try 4G again.Also, there is an app built into your phone called 'CSD tool', this allows hardware checks of the device. You can access CSD tool several ways; for me, I head to Settings/About product and tap 5 or 6 times on the actual Build Number, agree to continue and you're now in CSD tool. Now you can use the RF function check to test your 3G/4G connections.
Spam Hunter ( 2017-07-20 14:38:04 +0200 )editHi, thanks for your answer. I tried both of your solutinos, however none of them fixed my issue. But CSD tool passed the 4G test. Strange.
u-dash ( 2017-07-20 16:54:27 +0200 )edit