I loved Sprint when I had them in the early 2000's, but I never left the Buffalo area so I always had good coverage - other than random drop outs occasionally. How is it, over 15 years later, they still suck? Weren't they the largest provider once upon a time?
Data speeds and quality of service have improved greatly since Network Vision in 2013. Coverage not so much. Many towers in the smaller communities in the Southern Tier like Dunkirk, Olean , Alfred, Wellsville were 1x only up until 2013, and they were upgraded early on to LTE. Dansville was one of, if not the first towns to get LTE in the Buffalo/Rochester area. Then it came to the Buffalo airport and Wales. Due to the proximity of Canada, there is no band 26 in the BUF/ROC markets (probably Syracuse as well), which would greatly improve coverage and personally give me robust service at home. So unless they put up more towers there will be no improvement in coverage. IBEZ was supposed to be taken care of back in 2017 to allow for 800 MHz to go live, but that never happened (to my knowledge) and there's been no update so that's one of the reasons why I switched to T-Mobile in 2018.
A month or two prior to me leaving Sprint, I noticed that on the corner for Transit/Lossen in Depew by Wegman's, I could hit over 200 Mbps down, on LTE, but the upload was or 7 or 8 Mbps. I think Sprint was testing carrier aggression on band 41 there. Never got speeds that fast anywhere else. When LTE initially came to a tower it was 30 Mb Down x 10 Mb Up with very little deviation. As time progressed seeing speeds increased, seeing 60 x 20 was not all that uncommon. I'd hit 80 to 90 down on the tower closest to where I live. I have somewhat of a weird fetish for this stuff. When Network Vision started, Sprint published every tower upgrade on their website. They had a map, with the exact location of every tower, along with it's upgrade status. As soon as a tower in the Buffalo/Rochester area was marked upgrade complete, the following weekend, I drive to it and do some speed testing and measure the distance of how far the signal traveled in various directions.
I was a Nextel customer from 2002 - 2011 or so. I always thought Nextel had decent coverage around here. When I got the iPhone in 2009, I did not port over to AT&T on purpose since AT&Ts coverage was so poor. I carried two phones for a few years, the iPhone and my first Android phones were my internet device and my Motorola iDEN flip phone was my voice device. Plus I found, and I still find smartphones extremely uncomfortable to hold to the ear and talk on. Give me a good old flip phone any day.
Bottom line, in WNY if you have a Sprint signal call quality is great and data speeds are decent to very good. If you don't have a signal you roam on to Verizon at 1x most of the time or have no service. Not sure how Verizon's decommissioning of their 1xRTT network will impact their roaming agreement with Sprint.