New iPhone 5s will not work without old iPhone 4s turned on

[Bill1988]

Just got a nano sim activated for new iphone 5s.

When I found that my old iPhone 4s was still receiving the same calls that my iPhone 5s receives I turned off the old iPhone and put it away. After turning it off the new phone neither makes nor receives calls. When I turn on the iPhone 4s the 5s begins working again. This means that wherever I am in the country as long as my 4s is on at home my new 5s will work. I would like to turn the old iPhone into an iPod but need to know why the two phones are reliant on each other before I deactivate it.

Thanks,

Bill

[DaveCD]

@Bill1988 

This is very odd.

Is the new iPhone 5s set up with a new number?

Just a thought to see if the old number is receiving the calls and has been set up to forward them on to your new number.

We can take a look at this for you, contact our Live help team.

If they're not there straight away, sit tight and an advisor will be with you as soon as they're available.

DaveCD