No, that modem is puma6 based, you will probably experience latency issues and it won’t be a good experience. Docsis 3.0 is outdated anyways, especially ones with 16 channels. It wouldn’t be fast.
The arris sb8200 is 60 dollars on Amazon, however, keep in mind you will need a router too. It will be a night and day difference.
That’s the nature of wireless. Latency depends on many more factors and can vary a ton. If you depend on stable ping, t mobile may not be the best.