Want to switch from ATT

Tired of lots of ATT scams on our bills every 3-4 months for silly things. We have a huge account with them 550-750$ on avg a month just from actual services for our family. Every few months they find some way to boost that bill to 1000+. Just paid bill of 3k for international charges because they didn’t transfer the old international package we had on an iPad to the new iPad we put on that line. They wouldn’t remove it, even after I threatened to move to Verizon. So here I am starting that process.

We run a huge family account and I want to know if anyone has moved a large family account from ATT to Verizon and believe that it was worth it. Can we keep our numbers, will it take all day to do at a store? Any and all advice is greatly appreciated. Also, I want to know your horror stories too... I want to know if I am just trading one devil for the other and as the say, better the devil you know. Thanks y’all!