Yes, telephone marriage is acceptable to CIC. See p. 37 of the OP 2
Processing Members of the Family Class where Telephone Marriage is defined:
"A marriage in which one of the participants is not physically present and is
not represented by a proxy but participates directly by telephone is a legal
marriage if it is legally recognized according to the law of the place where it
occurred. This is a legal marriage for immigration purposes provided it
meets the Canadian federal requirements, with respect to consanguinity and
polygamy/bigamy."
See:
http://www.cic.gc.ca/english/resources/manuals/op/op02-eng.pdfHowever, given that your friend has essentially no proof of a relationship, I personally think they will have problems. You said that they won't have anything for proof other than phone cards. Phone cards are not accepted by CIC (though I have heard that some people have submitted these as proof). The problem is that the phone cards do not show who it is that you were speaking to. Also, marriage photos alone will not "prove" that a marriage is genuine, particularly given that only the wife was present. I personally think that they are better off waiting until they can submit proof of a relationship such as emails, phone records etc. than rushing into this now with insufficient proof.