Taking the smart phone away from teen

My wife is a genius!!
I am a dad of 4 great kids. 2 boys and 2 girls. been married for over 24 years. Raising them has been a blessing and a challenge. All good.
The one thing that my wife an I both realized pretty fast was that taking things away form them that they really lived for was a good way to manage their behavior. The thing is, that taking the smart phone or the use of our car  really inconvenienced US!!
My wife found this phone from ATT called spareone. spareone.com or ATT.com I think should get you there.
Bottom line--No texting, No internet, and free location tracking service. Made for safety and young children I think but works great as a Time Out Phone HAHAHA my wife is so smart. Its 25.00 for the whole year no monthly fee and the phone is only 59.00 I think.. our daughter hates seeing it on the desk in the kitchen knowing if she messes up it waiting for her 
Hope this helps.
BST