How to get a free replacement phone from AirTalk Wireless?

Excuse me, could you please elaborate on the process of obtaining a free replacement phone from AirTalk Wireless? Are there any specific requirements or steps that need to be followed in order to qualify for this service? Additionally, is there a time frame within which I need to report any issues with my current phone in order to be eligible for a replacement? Lastly, would I need to pay any shipping or handling fees for the replacement phone? Thank you for your assistance.