Hidden Battery power when iPhone is low on Charge?
Can anyone confirm if this is Fact or Fiction?
I recently found an article on the internet as quoted below and was just wondering if anyone could confirm if it is fact or fiction please.
> Is your mobile phone battery flat ?
> >
> All mobiles have Hidden Battery Power
>
> To activate, press the keys *3370# (remember the asterisk). Do this when the phone is almost dead.
> Your mobile will restart in a special way with this new reserve and the instrument will show a 50%
> increase in battery life.. This reserve will get re-charged when you charge your mobile next time.
> This secret is in the fine print in most phone manuals. Most people however skip this information without realising.
iPhone 5, iOS 7.0.3