Can I use my own phone with AirTalk Wireless?

Excuse me, I have a question regarding AirTalk Wireless service. I was wondering if it's possible to use my own phone with AirTalk Wireless? I have a device that I'm quite fond of and would prefer not to switch if possible. I understand that some carriers require specific phones or have compatibility issues, so I wanted to clarify before making any decisions. Could you please enlighten me on this matter? Thank you very much for your time and assistance.