Free 4G LTE Mobile-Phone Service from FreedomPop with a Samsung Smartphone (Pre-Owned)

4G LTE wireless Internet, up to 10 times faster than 3G
No data caps or speed throttling
No contract
Cancel anytime without fees
Plan options:

Free plan: 500MB data, 500 text messages, and 200 anytime voice minutes per month
Unlimited Talk & Text + 500MB plan: ($10.99/month; not included): 500MB 4G/3G data, unlimited text messages, and unlimited minutes
Unlimited Talk & Text + 1GB plan: ($19.99/month; not included): Unlimited text messages, unlimited minutes, and 1GB 4G/3G data