We've been really lucky. Our television is through Dish Network, who we've had good luck with. We are, however, about to drop TV service, since there's so little on worth watching these days that it's very expensive entertainment. Can't really justify both Satellite TV and high-speed Internet.
After we finally dumped AOL (yeah, that long ago) we went with EarthLink for our internet service (dial-up at the time.) Our connection had always sucked, so after we got EarthLlink, I sent a message to tech support. The reply? "Try a modem string- here's some web links." Damn, after that I was able to log in first time, every time, at the max capacity of the modem. And no busy signals with EarthLInk. When we made the jump to high-speed, we got it through EarthLink also- they buy bandwidth on TimeWarner's "Roadrunner" network. So far so good, other than having to reboot the cable modem an average of once a week.
Our daughter's cell phone was originally with AT&T. Other than being expensive, we had good luck with them, if you can believe it. And at the time, it was the best deal. We switched her to Verizon last year when she needed a new phone. Not only did we get a better deal, but she got the phone she (and we) wanted- a non-smartphone with a slide-out QWERTY keyboard. I have to carry an Android smart phone (LG VS998 4G LTE) on the Verizon network for work, which works perfectly. Of course, my employer in their infinite wisdom, has made some kind of deal where we all lose our 'droids and get stuck with obsolete iPhones.

NOT looking forward to that. My Lady Wife has a TracPhone for emergencies and as a backup for our landline phone. We keep that because it works if the power goes out, and for some bizarre reason the cell service at our place, despite being in LOS of several towers not too far away, is iffy at best. That, and spinning compasses, are the most normal of the odd things that go on around here.
I will check into whether or not our Internet works when the power goes out. I do have the power supply for the cable modem plugged into one of the UPS units. If we could solve the issue of no power = no phone service, then VOIP ("internet phone") might finally make sense. If it's a case of only having internet for 20 minutes or so until all the backup batteries run down, then forget it.