Iphone 5 is it locked on O2?

My dads bought a iphone 5 with contract on Vodafone but he wants my iPhone 4S instead then I can have the iphone 5! I'm on O2 I've used the phone 4 months so ill get my iPhone 4S unlocked so my dads Vodafone sim is accepted but I'm wondering whether I also have to get the iphone 5 unlocked so my O2 sim works! In it or does the phone come not locked on Vodafone?!

Take it to the store?

If bought from Vodaphone it is likely that the phone will be locked to that network. As you may know, you can test it by trying a SIM from a different network in the phone or, if that is not possible, you can try and ask Vodaphone themselves. Some network providers may unlock phones for free while others may charge a small fee.

99.999 certain it will be locked to Vodafone

FYI
you / your dad should be aware that All IP5 where ever they were bought will only ever be 3G on Vodafone and O2

All IP5 only have one 4G LTE band the 1800 MHz used by EE,

Both O2 & Vodafone launch 4G LTE services this year so when they are live as all IP ONLY have the EE band all IP5 are 3G on Vodafone & O2

Only Apple (ker ching) have released a 4G phone NOT 4G LTE READY

In both the March Vodafone & O2 magazine lots of 4G LTE READY (steady go) phones but NOT one mention of the most famous phone on the planet

A 4G LTE READY phone if unlocked can be used on ANY / All networks when 4G LTE arrived

IMO not the fault of the network re IP5, as why sell a phone once when you can sell it again.
no doubt the IP5S will be 4G LTE Ready
ker ching

Contact the guys over at http://www.myhtcunlock.com/contact-us/ They unlock HTC and iPhone, I'm very sure they will have something for you as well.

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