I'm not expecting it to be free but FreedomPop's latest 3G/4G hotspot is quite a good deal if you want a mobile hotspot around but you don't really need to use it often.
For $3.99/mo you get 500MB on the Sprint 3G/4G network and an additional $3.49/mo lets you roll over up to 500MB of unused data each month the thing is just sitting there unused. Yes 4G coverage is minimal nationwide, and I'd choose Verizon over Sprint given the choice, but for probably under $100/year my kids now have all the internet access they need for car trips. Additional GB are $20 if you use up what you've accumulated.
For $3.99/mo you get 500MB on the Sprint 3G/4G network and an additional $3.49/mo lets you roll over up to 500MB of unused data each month the thing is just sitting there unused. Yes 4G coverage is minimal nationwide, and I'd choose Verizon over Sprint given the choice, but for probably under $100/year my kids now have all the internet access they need for car trips. Additional GB are $20 if you use up what you've accumulated.