Internet setting for 4G is similar to 3G. Subscribers do not need to create a new APN to use 4G. They should only mark 4G/LTE in phone setting. To set it to 4G do as following
Setting>More>Mobile network>Network mode > (2G/3G/4G auto) or (GSM/WCDMA/LTE) or (Preferred 4G/LTE)
Setting > Cellular >Voice & Data >LTE
Setting > Mobile +SIM > SIM setting > Highest connection speed > 4G
It is recommended to mark “4G preferred” for modems so that the modem could connect to 3G or 2G in case 4G is not available. If “4G only” or “LTE only” is marked, the device would be out of service when there is no 4G coverage.
In case of being in 4G coverage the device automatically searches for 4G.
Also, if you want, you can refer to "Connecting to the RighTel Network Guide" on the RighTel website, to see a step by step way for installing the device.