For carrier compatibility this site has pretty complete info:
https://www.frequencycheck.com/
The Pyra modem is compatible with:
PLS8-E:
Penta Band LTE: 800/900/1800/2100/2600 MHz;
FDD-Band (20,8,3,7,1); Tri Band UMTS (WCDMA):
900/1800/2100 MHz; FDD-Band (8,3,1);
Dual Band GSM/GPRS/EDGE...