English I know very poorly, so the text of the post I will translate a translator from Russian.
Multimedia: Joying PX5 octa core, Android 8, 4Gb RAM, 32Gb ROM.
Modem: Huawei E3372s unlocked on all operators. Firmware HiLink. Work perfectly. is determined by without problems.
PPP widget use for a long time. Default setting. Root access is.
The problem is:
When you connect a modem, the first time it is determined well. Click "connect" and get access to the Internet without problems. But if you click the "disable" button, then when you click the "connect" button again, the PPP widget hangs with the inscription "network settings". If you click "disable", the PPP widget hangs with the message "disable" and nothing happens.
To re-gain access, you must physically remove and re-insert the modem into the USB connector.
I apply logs:
USB
PPP21 авг. 2018 г. 22:17:09
Device manufacturer string: rockchip
Total RAM: 4077 MB. Available RAM: 3054 MB
New device on /dev/bus/usb/003/045
Class of interface 0 is 0x02
Looking at USB device 12d1:14dc with class 2
Device top dir: /sys/bus/usb/devices/3-1, active cfg: 1
Active configuration ID: 1
Device layout (config 1) - cl:02 sc:00 pr:00
if:0 as:0 - cl:02 sc:06 pr:00 - ir:83
if:1 as:0 - cl:0a sc:06 pr:00 - bi:82 bo:02
if:2 as:0 - cl:08 sc:06 pr:50 - bi:84 bo:03
Found 0 serial ports
Opening port type ECM (interface 0)
21 авг. 2018 г. 22:17:27
Total RAM: 4077 MB. Available RAM: 3055 MB
Starting DHCP request ...
> Phase 3
ffffffffffff0c5b8f279a64080045100148000000008011399600000000ffffffff004400430134
<
ffffffffffffbaabbe340000080045000116000000004011b12ec0a80801ffffffff004300440102
NAK received
> Phase 1
ffffffffffff0c5b8f279a64080045100148000000008011399600000000ffffffff004400430134
<
0c5b8f279a64baabbe34000008004500013e000000004011b106c0a80801ffffffff00430044012a
OFFER received
> Phase 3
baabbe3400000c5b8f279a64080045100148000000008011399600000000ffffffff004400430134
<
0c5b8f279a64baabbe34000008004500013e000000004011b106c0a80801ffffffff00430044012a
ACK received
> Phase 9
ffffffffffff0c5b8f279a64080600010800060400010c5b8f279a64c0a80864000000000000c0a8
< (ARP, connection confirmed)
0c5b8f279a64baabbe34000008060001080006040002baabbe340000c0a808010c5b8f279a64c0a8
Local IP: 192.168.8.100/24
Peer IP: 192.168.8.1
DNS1: 192.168.8.1
DNS2:
Send initial IP packet ...
First IP packet received - we are online
End of DHCP negotiation
VPN setup complete
VPN network device is up
21 авг. 2018 г. 22:17:44
Total RAM: 4077 MB. Available RAM: 2953 MB
Network notification accepted after 0 ms
Connection is ready
21 авг. 2018 г. 22:17:54
Total RAM: 4077 MB. Available RAM: 2898 MB
Starting DHCP request ...
> Phase 3
ffffffffffff0c5b8f279a64080045100148000000008011399600000000ffffffff004400430134