For those having issues with visible. I have gotten it to work consistently with the steps below on firmware 3.100. Please note these are AT commands for the modem, a few people and myself have used this with no issues but I’m not reliable if something happens.
AT+QPRTPARA=3 (modem to its OEM state)
AT+QMBNCFG=“AutoSel”,0 (stop Autoselect config on sim detection)
AT+QMBNCFG=“Deactivate” (disable MBN config)
AT+CFUN=1,1 (reboot the modem)
AT+QCFG=“usbnet”,2 ( MBIM protocol)
AT+QCFG=“nwscanmode”,3,1 ( 4G-LTE only)
AT+CGDCONT=1,“IPV6”,“VSBLINTERNET” (Has to be ipv6 only)
After this the TTL that works for Visible is 64
Also for good measure copy and past this shown below in to custom rules
Tab to the left of custom TTL settings called custom rules.
#start TTL rules
iptables -t mangle -I POSTROUTING -o wwan0 -j TTL --ttl-set 64
#end TTL rules
Note: if you can’t find Custom rules install Luci from the plugin menu and look for Advanced under more settings in the left hand side at the very bottom of the menus.
If you DO not do the ttl visible will limit you to 5mbps.
If the simcard says Sim not registered just restart a couple of times and it should connect.