It is unlikely that it is possible to convert SME SMS backups to VCF contacts files. You need to obtain full backup of your smartphone in order to extract the contacts from it.
This conversion entry was verified by us and conversion was flagged as wrong or not possible.
Usually this happens when the conversion would try to convert different types of data between each other, such as audio to image, or it is not possible because incompatibility between programs, caused by closed file formats, very limited support etc.
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