Yes I do use a custom APN. I usually leave the service mode as automatic as the modems are moving about a lot in machines and have roaming sims. However I will try setting it to just 3G + 4G.
The issue is completely random - An old RUT955 had this issue a few weeks ago and that's been running perfectly for 2+ years with nothing changed to it. On the other hand I've had another brand new RUT955 have this issue less than one month after it was set up.
I use an older firmware version which works best for the NTRIP Client for me.
I am aware that the best solution would be to upgrade to latest FW however is it still correct that I'll have to wait until FW 7.3 until I can use NTRIP Client? If so can you give me an update on the release date please?