Just for the record, that's not an airgapped device. An airgapped device can't access the internet at all, like some of the airgapped hardware wallets we have or an airgapped computer with the network/WIFI card removed. What you are doing is better than having your crypto on a phone you use for everyday activities, though.
Oh really, thank you so much for correcting my misconceptions about airgapped device, i thought that any device that you are not connecting to the internet with frequently and only main for storage can be referred to as airgapped device.
Fact is that my main aim is to keep my wallet separate on the device that inhave no use for and dedicated to that purpose only, so you are right in the last statement of the usage of the said device.