Why can't I get my RU500CNV working?

I get good signal and connected to the right network. And It can even ping dns server.
But it can’t ping it’s own gateway or can’t get me connected to internet.

And aftter I change PDP settings and at&w, it rolls back when I restart it. it won’t work after at&f and atz. I just can delete PDP 2 which I create for experiment.

Running ‘ping -c 5 -W 1 10.57.158.1’ with DEVICE=eth2 SRCIP=10.57.158.91 FWMARK=0x3f00 FAMILY=ipv4
PING 10.57.158.1 (10.57.158.1): 56 data bytes

— 10.57.158.1 ping statistics —
5 packets transmitted, 0 packets received, 100% packet loss

Running ‘ping -c 5 -W 1 223.5.5.5’ with DEVICE=eth2 SRCIP=10.57.158.91 FWMARK=0x3f00 FAMILY=ipv4
PING 223.5.5.5 (223.5.5.5): 56 data bytes
64 bytes from 223.5.5.5: seq=0 ttl=115 time=49.476 ms
64 bytes from 223.5.5.5: seq=1 ttl=115 time=54.115 ms
64 bytes from 223.5.5.5: seq=2 ttl=115 time=50.001 ms
64 bytes from 223.5.5.5: seq=3 ttl=115 time=52.746 ms
64 bytes from 223.5.5.5: seq=4 ttl=115 time=46.904 ms

— 223.5.5.5 ping statistics —
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 46.904/50.648/54.115 ms
Running ‘ping -c 5 -W 1 180.76.76.76’ with DEVICE=eth2 SRCIP=10.57.158.91 FWMARK=0x3f00 FAMILY=ipv4
PING 180.76.76.76 (180.76.76.76): 56 data bytes
64 bytes from 180.76.76.76: seq=0 ttl=47 time=60.792 ms
64 bytes from 180.76.76.76: seq=1 ttl=47 time=64.830 ms
64 bytes from 180.76.76.76: seq=2 ttl=47 time=59.610 ms
64 bytes from 180.76.76.76: seq=3 ttl=47 time=38.275 ms
64 bytes from 180.76.76.76: seq=4 ttl=47 time=52.257 ms

— 180.76.76.76 ping statistics —
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 38.275/55.152/64.830 ms

OK
at+csq
+CSQ: 22,99

OK
at+qeng=“servingcell”
+QENG: “servingcell”,“CONNECT”,“LTE”,“FDD”,460,00,67CEFAB,450,1300,3,5,5,35B4,-80,-11,-85,0,10,0,42

OK

Dear @TR_J
You can try to mark a data call via AT+QNETDEVCTL, like

why can’t I delete pdp 2?

AT+CGDCONT=2
OK

AT+CGDCONT?
+CGDCONT: 1,“IPV4V6”,“”,“0.0.0.0”,0,0,0,0,0,0,0,0,0,0
+CGDCONT: 11,“IPV4V6”,“ims”,“0.0.0.0”,0,0,0,0,0,0,0,0,0,0

OK
AT+CGACT?
+CGACT: 1,1
+CGACT: 11,0

OK
at&w
OK
at+cfun=1,1
OK

+CPIN: NOT READY
+QUSI
+CME ERROR: 4

+QIND: SMS DONE

+QNETDEVSTATUS: 1,1,“IPV4V6”,0

+QNETDEVSTATUS: 2,1,“IPV4V6”,0
AT+CGDCONT?
+CGDCONT: 1,“IPV4V6”,“”,“0.0.0.0”,0,0,0,0,0,0,0,0,0,0
+CGDCONT: 2,“IPV4V6”,“”,“0.0.0.0”,0,0,0,2,0,0,0,0,0,0
+CGDCONT: 11,“IPV4V6”,“ims”,“0.0.0.0”,0,0,0,0,0,0,0,0,0,0

OK

Dear @TR_J
You can’t delete this, just modify or activate.