The number will vary depending on the year the product was released, its color, the carrier, and some other factors. Every model that falls into that category (same color, etc.) will have the same model number. Find the number through the settings. Dial *#06#.
Check the Modem Type in the Network section. A modem type of GSM or CDMA relies on outdated 3G networks and should be upgraded. An LTE modem type does not need to be upgraded at this time. If this section is blank, this unit does not have a modem. Check the modem type for the Gateway unit.
Yv0D.