The frequency band from 902 to 928 MHz is designated as a license-free spectrum for nationwide use, for broadband services and other applications.
The maximum transmission power delivered to the antennas of the systems must not exceed 1 W. Transmission antennas with a maximum directional gain of 6 dBi may be used, such that the maximum Equivalent Isotropically Radiated Power (EIRP) does not exceed 4 W. If antennas with a directional gain greater than 6 dBi are used, the total input power to the antenna must be reduced by the same amount that the directional gain exceeds 6 dBi.
https://www.frequencycheck.com/countries/mexico
https://www.dof.gob.mx/nota_detalle.php?codigo=4913219&fecha=13/03/2006#gsc.tab=0
https://www.thethingsnetwork.org/docs/lorawan/modulation-data-rate/