The iPhone users are usually bugged off by entering into the settings app umpteen number of times. Though this can be overcome by JBing, the instability associated sways away many of them doing so. The airplane mode in iPhone can be switched off without going into the settings app.
Go to Messages app or just call anyone in aeroplane mode
Get the option of disabling the aeroplane mode directly there.
Though this is a small trick, nevertheless a significant one for iOS controlled users.