Many mystery shop companies have phone shops, but they vary from one part of the country to another. I do not know of a list of companies which consistently have phone shops. Some people on this forum may be willing to share names of companies that they do phone shops for. Otherwise, there is a list of close to 200 mystery shopping companies at the bottom of this page. Personally, I am not aware of any companies which have lots of phone shops. Some, for instance, will also require that you be a customer of a specific bank or credit union. You might search the Forum for phone shops as keywords. I know that people have been complaining in the last month about $2 phone shops. in general, they don't pay much. I personally ignore the $2 ones, and they just pass out of my mind.
Shopping Southeast Pennsylvania, Delaware above the canal, and southwestern NJ since 2008