Helium Mobile's 10GB plan for 3 lines costs $45 per month.
It rides on the T-Mobile and Helium network for coverage.
It includes unlimited minutes, unlimited texts, and 10GB of high-speed data per month. The data is shut off after you reach your high-speed allotment. You get 5GB of hotspot data. Video streams at 4K quality.
The Helium Mobile Air plan has deprioritized data. Having deprioritized data means you may temporarily experience slower speeds during times when the cellular network is busy. You'll resume getting the fastest speeds available when the network is no longer busy.
Overall, I recommend the Helium Mobile Air plan because it is a good value.
You can also check out these plans with the same coverage and data amount (scroll left and right to browse plans):