To make your phone work as a card reader, you will have to install an online billing app. There are quite a few in the market that you can use. Apple Pay for iPhone, Google Pay for Android phones, or the new and popular ScanPay are great apps for safe mobile payments.
You can qualify for a cell phone tax deduction from cell phone charges incurred when the mobile phone is being used exclusively for business. There is not an IRS cell phone deduction for self employed people, exclusively.
Expect extremely mature content on all fronts. Teens and others are tortured in various ways (lips sewn shut, burned with an iron, etc.), a character is shot, and there's plenty of blood, as well as a jump scare or two.
Mature (M)\n\n M-rated films and computer games are not recommended for children under the age of 15. They include portrayals of elements such as violence and themes that require a mature outlook. However, children under the age of 15 may legally access this material as the classification rating is an advisory category.