![Yeastar 4G LTE Module-A for S-Series IP PBXs - YST-4G Yeastar 4G LTE Module-A for S-Series IP PBXs - YST-4G](https://cdn11.bigcommerce.com/s-u3uxlvxq3h/images/stencil/400x400/products/9050/26341/YST-4G-2__97626.1584438091.jpg?c=1)
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Yeastar YST-3G is a module for giving your Yeastar IP-PBX a single 3G or UMTS channel of cellular connectivity. The radio works on the 900/2100, 850/2100 and 850/1900 MHz bands and uses a SIMCon GSM engine. Insert a SIM card into this module just as you would a cell phone.