> Nice app, but…
>  
> It’s designed to UK dialing style… Instead of just copying the
> “tel:” numbers from DNS in the format as they appear (like +48606….)
> it replaces “+” with “**” – this doesn’t work in Poland…

The '**' prefix is the app's ENUM bypass prefix.  

The app has to add the prefix to tel: URIs (and then later strip it off again) so that they don't go back through the ENUM lookup when you dial them.

Can you please let me know [offlist] what number you were trying to dial?

Ray