Can we have a phone system with only mobile phones?

Yes, you can have a phone system consisting of only mobile phones.

With Flexfone you can have a phone system with only mobile phones, and still have the same features as a phone system with desk phones or a soft phone. If you have phone numbers in your current phone solution on desk phones that you want to keep when moving to a Flexfone solution, we will assist with transferring the numbers to Flexfone.