Ya know... I wonder if the police/black helicopter guys have a Stingray installed in your area?
I've anecdotally noticed a "pattern" that in certain areas with ample wifi and cell signal, calls not being connected, SMS messages vaporizing into thin air, etc... and I wonder if the Stingrays are not so good at passing on valid data as they are at collecting it...
Because, these problems seem to occur in areas police find "interesting"... like Rainier Ave, and a wide stripe on either side of Aurora Ave in the north end (where meth heads are making product in quiet little residential subdivisions), etc.
I wonder if they can trace the signal path your data is traveling?
Either way, it's gotta be goddamn frustrating.
Here's a way to figure out where Stingrays are operating: http://www.citylab.com/crime/2016/10/racial-disparities-in-police-stingray-surveillance-mapped/502715/
The ACLU is also tracking their use: https://www.aclu.org/map/stingray-tracking-devices-whos-got-them