Just typing private keys takes a few seconds, I get it right at first try 50% of the time.
Using a phone, saving to SD-card, and copying to your computer seems like more work to me.
@jackg - I have ordered a webcam for future paper wallets, so I can use that on my air-gapped machine.
How do you transfer the coins form the air-gapped PC? Sign a transaction, broadcast it on another PC?
Yes I have a few spare old android phones. Going to reset it before I use it.
I never trust Android to completely remove data from the phone, but as long as it's offline and you never use the same private keys again you don't have to destroy the phone after your session.
copy private key and send it to your facebook messages
No. Just no. I know it's been said before, but let's emphasize it again: don't recommend Facebook messages when someone is working securely on an offline computer. Always assume Facebook stores all your data for eternity.
Since we are into paper wallets. As I trust them more than anything else. I will let you know about OMNIWALLET.COM
A web wallet is the last thing someone on an air-gapped PC needs. It's .org BTW, not .com.