now has inked data offloading deals with all major US carriers and a carrier in Mexico. The plan is $20/month for unlimited everything. It uses the T-Mobile towers plus other CBRS and WiFi coverage just for the network.
If you choose, you can also enable network mapping which tracks your coverage and location maps coverage levels. They pay you for this. The rewards are paid daily in crypto if you are eligible (if you don’t map anything that day you aren’t eligible). You can either just sell those or you can use them to pay your monthly bill.