Do the XBee Pro at 10dBm require IFETEL’s Resolution NOM-121 certification?
Is modular certification even possible under NOM-121?
Which XBee module are you referring to?
Only XBee 900HP have IFETEL certification:
https://www.digi.com/products/xbee-rf-solutions/modules/xbee-pro-900hp#specifications
Primarily the S1 pro; but the new S2C replacement as well
Only the XBee PRO 900 HP has certification for use in Mexico.