[help]Don't put calls to background!

[Guest EndruBoy1]

Hello!

My parents are a little unfriendly with Android and tend to make huge bills because they fail to end their calls correctly and Android just put it to the background and the only thing reminds them for this is a tiny little green phone icon on the status bar (whitch they often fail to see).

Can anyone suggest an app or solution to avoid this?

Thanks.

Edited December 15, 2013 by EndruBoy1