The address needed to reach the pertinent imei revision box is - http://192.168.100.1/#/at
Once there you need to enter your 15 digit IMEI for the married gateway. TMHI for example marries the sims to only TMHI approved devices. As such in order to have a functioning handshake with the tower it must match accordingly.
To proof read the entry you may use this command
AT+CGSN
Required step for
- T-Mobile Home Internet Sim
- Verizon Home Internet Sim
- MetroPCS Tablet Sim
- MetroPCS Phone Sim
RESTORING OR RESETING ROUTER DOES NOT REMOVE IMEI REVISION