Please check the following conditions:
You have to configure first the HSPA connectivity and the SIM. Go to Administration -> Networking -> SIM and enter the APN that the provider gave you with the SIM (may be you’ll have to call them or check their website). The other fields can remain empty.
Then, go to Administration -> Networking -> GPRS/HSPA, in the Connection mode section, click on the enable checkbox and save.
The GPRS/HSPA connectivity may take a couple of minutes and when the connection is established, the GPRS LED will turn on.
Hint
Complete manual available at https://nethix.co/doc/en/we500/we500_sw_manual.html