I think it depends on where you live but mine is ATT Prepaid. I pay $300 a year for 16gb, though I only use <5GB month. I have tried:
- RedPocket (Verizon) - Depolarized too much for data
- Google Fi - Might be better now but when it switched from a Sprint and TMobile tower it used to drop the call… I havent tried it in many years
- Verizon - My favorite but I wanted to stop paying so much $$$ Mint - Cheapest plan I had because of sale ($7/month for 6 months). But TMobile service for me where I am isn’t great so wasn’t worth.
- Cricket - Loved it but just a little more expensive than ATT Prepaid
No cut off. AI may have some books out there but not all. There will always be authors out there like Martha Wells, Sanderson, john Scalzi and even new debut authors all the time trying to write. Agree with other poster, you’re only going to miss out by limiting yourself