Public Mobile and Koodo are owned by Telus. Telus and Bell are sharing the same towers.
Telus/Koodo/Public Mobile frequency bands are :
3G UMTS/HSPA (850MHz/1900MHz)
4G LTE Band 4 = AWS 2100/1700MHz
4G LTE-Advanced = 700MHz (not yet launched by Telus/Bell)
To get a new smartphone that will work on Public Mobile, you have to purchase a phone unlocked or locked to Telus/Koodo.
Thanks Cyber , i want to buy this phone , it will be work with PM