If it is not a config file, it may be an old, obsolete image thumbnail format.
To make sure you're using the right method, can you tell me: Download Telenor File tnl
Select "Import" or "Restore" and browse for the downloaded .tnl file. If it is not a config file, it
for this file? (e.g., getting free data, accessing a restricted site) What app are you trying to use to open it? it may be an old