If you've been on the fence about the Mint Mobile $45/3month/12GB SIM, today might be the day.
Buy through clicking through from the Rakuten (formerly Ebates) site, and get $40 cashback. I believe shipping is free from Mint right now, but I believe there will be tax. (EDIT: tax and Regulatory Recovery Fees added $5.73 in my locale.)
If you don't already have an Rakuten/Ebates account, grab a referral link from the referral thread
https://www.nthcircle.com/forum/misc-telecom/76-referral-links-allowed-in-this-thread-only-hungryghost?start=90#41790
for an additional $10 in your cashback account-- probably reducing your final cost to $0.
I've had reliable cashback results from Rakuten, and used it on a previous MInt promo last year.