Problem with accessing Yahoo mail through browser (T-Mobile USA)

[drdigital1]

I am a T-Mobile USA subscriber. For the last couple of days I have been getting “Service is temporarily unavailable. Please try again later” when I try to read yahoo mail through the browser. This has been my preferred way for quick access to yahoo mail for the last 3 years.
Note: The message comes from yahoo (has yahoo logo on it). Everything else is fine with the browser.

Any advice?

[drdigital1]

Since nobody replied to my issue, I concluded that this is NOT a generic problem with Yahoo mail, and indeed, with a different phone accessing Yahoo mail through the browser worked fine. After power-cycling my MING phone, the problem went away. Something must have been corrupted in the browser.