It depends.
In some yes, in some no.
It depends if the vodafone mobile is working on the same range or something as the XT network runs on.
Check your Vodafone or Telecom store.
no
Yes, you can as long as the O2 phone is unlocked, then you can use a Vodafone SIM on it, or a SIM card from a different carrier.
If the phone is unlocked you should be able to put any type of sim card in there as long as it is a GSM phone with a sim card slot.
Yes, An "Unlocked" Phone means you can put ANY operator ("Orange", "Vodafone" etc) SIM card in it.
Only if your phone is sim free.
try doing a factory re set on your phone or take the sim card out for a few minutes then put it back in if that does not work then you may to take it a vodafone dealer and get them to have a look at it as you may need a new sim card
sim card rejected how to activate the sim mobile no:7639083856 vodafone sim
Optus
The kind of SIM cards that Vodafone uses requires a V2 type SIM card. These vary in types from those that hold 150 phone numbers to 200 phone numbers.
The sim card.
Put the SIM card from the new phone into the old one. Copy the contacts from the old phone's memory to the SIM card. Put the SIM car back in the new phone - then - either copy the contacts to the new phone's memory - or leave them on the SIM card. Either way - the new phone will find them.
how do you open the back of a vodafone 340