You cannot convert Nokia ringtones (.nrt) to a Nokia PC Suite backup (.npf) files , which is what nrt to nfb conversion likely represents. You could perhaps backup your whole phone, which puts all your files in that backup, or perhaps you meant the opposite conversion which may perhaps be doable.
Home > Search converters: nrt to nfb
Conversion of nrt file format to nfb file format beta
Search for nrt to nfb converter or software able to handle these file types.
Convert Nokia ringtone to Nokia PC Suite phone backup.
We have found one software suitable in our database for this conversion.
Microsoft Windows software 
- convert nrt to nfb on Windows
Nokia Suite
A set of applications used to manage older Nokia mobile phones
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from nrt file | No | No | No | No | No | Yes | No | No |
to nfb file | No | No | No | No | Yes | Yes | No | No |
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.
Additional links: Open nrt file, Open nfb file
NRT
Files with nrt suffix can be found as ringtones for some older Nokia mobile phone devices.
NFB
Files with nfb suffix can be usually found as older backups of Nokia phone made using Nokia PC Suite. Latest versions use nbu files instead.
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