It seems that the problem is related to the chosen connection manager, with pppd the app opens allowing to send messages and USSD codes but it does not have support to manage internet connections, and if I choose the Network Manager the app just closes
Model: Huawei E303
It seems that the problem is related to the chosen connection manager, with pppd the app opens allowing to send messages and USSD codes but it does not have support to manage internet connections, and if I choose the Network Manager the app just closes