The GX400 for EVDO networks does NOT require a SIM card and activation can be done with the appropriate network operator representative and the ESN of the device located on the bottom.
The GX400 for HSPA+ DOES require a SIM card, which can be procured from the appropriate network operator representative.
- Sim cards used for other AirLink HSPA devices CAN be used in the GX400.
The GX440 DOES require a SIM card. This is notable, since this is the first time that an AirLink device on the VZW network requires a SIM card. SIMs can be procured from your VZW representative during the course of account activation.