Yeastar Technology S-Series - Page 18

Installation_Guide | 1 - Installation Guide | 18
• S2 Module • O2 Module • B2 Module • SO Module
• GSM Module • 3G Module • 4G Module
Note: Before installing the module, check if the module is clean and intact.
1.
Loosen the screws at the bottom of the device and remove the upper cover.
2.
Insert the module to the Module Slot.
3.
Follow the instructions to insert a SIM card on the GSM/3G/4G module.
Note: Skip this step if no GSM/3G/4G module is installed.