LG Harmony 2 (Cricket)
If you want a pre-paid phone from a carrier you know is reliable, consider the LG Harmony from Cricket. For those that didn't know, AT&T owns Cricket Wireless, and Cricket uses the AT&T 4G LTE network.
The LG Harmony delivers a big 5.3-inch HD display, a quad-core processor with 2GB of RAM, 16GB of storage, Android Nougat and a 2,800 mAh battery. Not to mention an 8MP rear and 5MP front camera. However, there's no fingerprint scanner. You can pay a few more dollars for the new LG Harmony 2, also, if you'd like.
Here's the deal though. This phone was $100 when it first came out, but now you can get it from Cricket for only $9.99 if you're a new customer. Or, for existing customers, it's still only $69. Another solid option is the LG X Charge for $69. It has a huge 4,500 mAh battery.