Connection troubleshooting checklist

  1. Please ensure an adequate and stable power source is supplied to the router or device which is correctly rated to the manufacturer’s specifications.
  2. The SIM should be securely inserted into the router or device, and any SIM slot covers should be screwed or secured into place. If the router or device has multiple SIM slots, please ensure that the SIM is in the correct corresponding slot.
  3. Ensure all antennas are securely attached if applicable.
  4. Most SIMs are supplied with configuration details which need to be configured on the router or device to allow network operation. These are commonly:
  • APN
  • Username
  • Password

These details may be case sensitive.

Useful tips

Ping Reboot

Ping reboot is a useful tool that is available on most routers (sometimes referred to as Keep Alive, Cell ICMP Check or ICMP checking), that allows the router to ping a defined IP address or host name to check for a connection. This is helpful if the router loses power or drops the cell connection, minimising the need for site visits.

Locking your connection to 3G or 4G

Locking your connection to 3G or 4G (depending on router and SIM capabilities) is a good way to ensure that you get the best connection speeds available. Please refer to your router’s manual for more information.

Port Forwarding

Port forwarding may be necessary on your router to ensure that devices attached to the router can be accessed remotely from across the internet. This is most common with our fixed IP SIMs to allow a remote connection to a device on a single port or range of ports.


In the interests of security, we always recommend that you change the default usernames and passwords for your router(s) and attached devices. Anvil’s Fixed IP SIMs are publicly addressable and, as with any public fixed IP service, it is important to ensure equipment has the necessary security implementations in place.