Hey, really hoping someone here can help as I'm at my wits end. I've followed all steps suggested elsewhere and have had no luck so far.
I have a new RUT955, and a SMARTY SIM (Three network) in it. I receive no data unless I disable 4G (running in 2G+3G or 3G only modes works, 4G, or 3G+4G doesn't). When I reset into 4G+3G I sometimes receive data for 10-15 seconds and can ping out to the DNS/any website, however this connection suddenly fails and no further data is received. Pings come back as '100% packet loss.'
So far I have reset to factory conditions, updated the firmware, changed to manual APN, changed to manual DNS (using Google's 126.96.36.199), made mobile the primary connection. No change at any point.
Meanwhile my iPhone SIM (EE) works perfectly in the router, and the SMARTY SIM works perfectly in my iPhone.
I'd be eternally grateful for any help available!