You can also use the burner app - just download the app to your every day smart phone, select one of the available numbers and off you go. Monthly fee is usually around $6 bucks and you can "burn" the number anytime you want and start up a new number. Not sure how the fee compare to keeping a separate burner phone going, but it is probably less of a hassle to juggle two phones; keep both charged, paid up and within reach, sounds like a lot of work to me...