It is valid and is recognized by most of the scholars around the world. Not sure if getting it done again is required.
on the side note and as a word of advise, if you don’t know the person/family personally, don’t do the nikah over the phone. 
It is valid and is recognized by most of the scholars around the world. Not sure if getting it done again is required.
on the side note and as a word of advise, if you don’t know the person/family personally, don’t do the nikah over the phone.