Annoying "Turn off airplane mode" hint

How can i turn that annoying airplane mode hint off?

Background: I work in medical environment and have my iPhone 3gs most of the time offline (airplane mode).

Everytime when i switch between apps the iphone comes up with an annoying "Turn off airplane mode" hint. Even apps that dont require an internet connection like podcast or the nike running app constantly ask for an online connection.

I really appreciate any help.

- iPhone 3gs
- IOS6
- no jailbreak

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