I can browse to my RUT850 from my Samsung S9 phone using 192.168.1.1 successfully however, if I use the Teltonika Router app version 3.1.20 after putting my admin/password in I get the message 'please check if connected to router'. I have tried on two separate Android devices and I get the same message every time - the admin/password is correct as it let's me access via the browser every time using the same details.
Teltonika RUT850 - FW RUT850_R_00.01.03.5
Teltonika Router app - Version 3.1.20
Any ideas, thanks.