Is Digi XBee Zigbee S2C module equipped with SAW filter?

I am working on some project, which involves communication over Zigbee protocol using Digi XBee Zigbee S2C RF modules as coordinator. I observe some interference issues most likely related to the presence of 3G equipment on site. In order to proceed with troubleshooting I would like to ask if Digi RF modules are equipped with surface acoustic wave (SAW) filters.