Thanks for comment.
I already mentioned that I´m aware of the phones higher CPU capacity as I also mentioned earlier. According to RSSI table for 4G LTE, -85dBm to -95dBm is poor and "Performance will drop drasticly", how do you mean with -90dBm working perfectly?
I use the LAN-connection on RUT240 for IPTV, I can´r see that this mean data has to travel trough more devices..? 4G -> router -> LAN ... still the reception stops occasionally... I also compared speed between LAN and WiFi-connected PC on the router, it´s about the same.
As I wrote, I think there must be som settings and prefereably something including my mobile operator (Telenor). Earlier when using a Huawei 4G router, also with an outdoor antenna, I did not have these speed or capacity problems, and always better speed when signal strenght was higher.
Of course the load at the base station will be a factor that affects the results, but after several moths travelling to different places in the RV, and checking at different times day and night there should be bigger differences in the performance dont you think?