I have a Galaxy S9 since 1y and it worked fine. Recently I updated the software to the latest version, and I noticed my 4G doesn't work. The symbol shows, but only the arrow UP is constantly lit. The DOWN arrow is blank. I contacted my provider and they saw no problem. They have given me a new SIM-card, without any result. When I put this SIM-card in an old S6 device, the 4G connection works fine. So I think the problem is with my S9 device. Maybe it has nothing to do with the update, but I think this in not a coincidence.
Anyone has this problem too?
I have no 4G symbol either on my S9.
The settings is on 4G.
But if I turn of wifi the 4G or 4G+ symbol comes up.
So I think the S9 prioritaise using wifi and when wifi is not availible S9 goes over to 4G.
I have the exact same problem (4G arrow up, sim swapped, no solution). Also did an update recently. I contacted my provider (Proximus Belgium) and they said this is known issue at Samsung. I have changed the settings to only connect through 3G/2G and that works. Don't forget to reboot after you've changed the setting.
Here, in Belgium, the same problem. After the update: no 4G anymore. Changing the settings in 3G/2G works, but that isn't a solid solution. Hello, Samsung? A reaction please! We want 4G back!