Assuming it's a contact in the phone's memory - just do exactly as you would if both phones were home in he UK. The network will sort out the logistics and connect both phones.
list out the operating frequency of mobiles in the UK list out the operating frequency of mobiles in the UK
You can't.
UK numbers beginning with +44 74xx (or 074xx within the UK) are mobiles.
Mobiles are not allocated on an area-by-area basis. The number could be anywhere in the UK !
Customers can call 789 from their Virgin Mobile phone to call Virgin Mobile UK. Other customers can call 0845 650 4500.
Because the mobile networks are different. You will have to use a local (NZ) mobile network if you want to use the phone in NZ.
UK area codes 0800 and 0808 are toll-free; however, charges will still apply for calls from mobile phones, except for certain charities and other organisations that have arranged for their numbers to be free from mobiles as well.
To call a UK-based mobile phone, wherever in the world it may be physically located, you always just dial the UK mobile number the same way you do when the mobile is in the UK. The network will automatically locate the mobile and re-route the call accordingly, and the mobile user will pay any applicable surcharges for roaming.
To call a UK mobile from a UK landline, you always just dial the UK mobile number, exactly the same way you do when it is in the UK. The network will find the mobile automatically, and the mobile user will pay any applicable surcharges for international roaming.
It's from the UK (the +44 indicates it originates from here). the next digit (7) defines it as a mobile (cell) phone number. All UK mobiles start with 07, but when calling from overseas, you omit the first zero.
The fact that the UK mobile is in France has no bearing on the cost to the original caller. The caller will pay the normal charge for a call to a UK mobile number, and the mobile user will pay any applicable surcharge for the international roaming.
To call a UK-based mobile phone, anywhere in the world that it may be physically located, just dial the UK mobile numberexactly the same way you do when the mobile is in the UK.