Here's what I do... I am NEVER more than about 30 minutes away from my studio during booked hours. Not yellow...I mean, booked. I don't trust Tutor Teach or Telegram to keep me up to date. So if I have an hour of greens, I'll wait until 5 minutes into an 18:00 to 19:00 spread and go to the store. Or a short trip to work out.
If you have a laptop that you can connect to TABC somewhere, that is much more reliable. If I have some consecutive greens, I'll take my netbook to my gym that has wifi. Logging in and periodically checking the screen is the most reliable.