Home Internet Wi-Fi disconnecting

We are having the same problem but only recently again. We travel for work, and service was sketchy In Dothan, Al. We went to Richmond, VA and were getting speeds about 200-275MB/s with no issue even living miles out of the city. Recently got to Springfield, MO and service was decent at first (I have 5 bars, and customer service even said we are in a perfect area for the tower) but it disconnects every other hour or so and won't reconnect unless I unplug it. 

Note- I just switched from the older gray cylindrical home internet box, to the new smaller black box and same issue persists. Have had the new one hooked up for a couple of days now, and upgrading to the new one did nothing to help with the service interruptions.