'Powershell Script put prefix in front of Numbers in CSV File

i've got an CSV File that looks like this:

"Vorname";"Name";"TELEFON1";"TELEFON2";"TELEFON3";"TELEFON4";"TELEFON5";"TELEFON6"
"-------";"----";"";"";"";"";"";""
"Test";"User";"4408***321313";"";"";"";"";""
"NULL";"Sample";"07080**00";"070**700";"";"";"";""
"Sample";"Me";"070**147730";"";"0160";"";"";""
"NULL";"NULL";"0706**10";"0706***550";"";"";"";""

so what I want to do is, I want to search for all Numbers that doesn't start with a 0 and put a 070 in front of it. Hope anyone can help.

[ofcourse all numbers are just sample numbers and do not really exist]



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