I have Deco-P9 mesh wifi at home with  ZTE MC801A 5G modem. In order to use the modem from same family, I decide to replace with Deco X50-5G. However, speed it very bad. I can get 300 bps with ZTE but same SIM card Deco X50-5G gives only 25 to 30 bps. I don't understand what is wrong? Both modems are connected in same place, same SIM card. Even when I see user interface of Deco X50-5G, signal of mobile network is 100%. Is there any settings that I am missing?