Never heard of Softify - what is it?
There seem to be multiple sites with that name so I'm not sure what you're referring to.
If all apps other than this work on carrier data then there's nothing wrong with your internet/APN settings.
Double check them here just in case:
Other than that I can't imagine why one app would be reporting a network connection error when others work but maybe the site in question has a support/FAQ link that might help?
Hope this helps.
Anything useful here?
https://community.spotify.com/t5/Android/No-internet-connection-available/td-p/144344
https://community.spotify.com/t5/Android/No-Internet-connection-when-connected-to-WiFi/td-p/4725973
Hope this helps
Yes they are links to the Spotify support forum but I assumed that they might be useful since you never made it clear that you had already checked that forum.
Since nobody else has complained recently about Spotify not working on 48 the chances are that your problem is down to something on your specific phone and not the network.
But if you want 48 support to check things for you then you'll have to contact them and ask them to do this.
Your reference to MSISDN doesn't really make sense in this context.
Hope this helps.
While you're here, check out our "Featured Topics" below.
Our Troubleshooting Guide and Knowledgebase contain help and support articles and popular questions to help you as a 48 customer.