I’m looking for a service that allows me to hide my personal phone number when shopping online.

This doesn’t need to some Snowden level privacy, I just don’t want online merchants to get my personal phone number.

Currently, I’m using a second unlisted number, and just request a new number ever 1-2 months, which works okay. My problem is that is takes up a sim slot, and I’m already using both my sim slots, so I’m forced to use a second phone, which is just annoying.

Does anyone know of a voip service or some way to forward calls that works in the EU?

It has to be somewhat easy to use and affordable, I’m not looking for a complex or expensive business/enterprise solution.