This is not an uncommon problem, the net is chockfull of users complaining their androids are sending almost nonstop buzzer alerts,
"failed to sign in to yahoo"...over and over and over,
even when I have repeatedly signed into yahoo, and even when I have made entirely new passwords, and cleared cache, and restarted phone, and almost everything else that is recommended above.
I have had this trouble off/on with my galaxy s4 and the email app that came built into the phone which i'd set to my yahoo email account as the default for that.
IT'S TRUE what someone else above said--
-this only happens when I am on 'data' and Never happens when I am on wifi.
anyway,
I read the last post above there, and thought, since no one else replied, that THAT must be "THE" solution,
and then, when I followed the directions, and i read the many pages of info, on creating an app specific password, and after so many paragraphs of warnings, caveats, etc, and so many more steps involved than is indicated in the post above, about turning off two step verification, and some of the instructions did NOT match the steps found on my gs4...
I DID THIS:
EASY CHEEZY SOLUTION. DOES NOT EVEN HURT, ha ha. Takes all of one minute.
I decided to delete my yahoo "stock" app (the email app that came built into the phone, it is white envelope icon, with red circle, says "email" under it). Well, the app IS still there, but, there is no longer any email account associated with it. It's blank/empty/unused. Nothing at all in there, if I click on it now, except a place to "set up email"
You DO NOT lose any data at all. soon as you log into the play store version of the yahoo app, Evvvverything is right there, even drafts, etc.
and now I just use the Yahoo app found in the "play store", which NEVER ever gets honked off about "failed to sign into yahoo". Not even when I am off my wifi and just on data. YAY!! .
This app icon is a
purple square, with a white envelope with a blue triangle on the envelope. THAT app has wayyyyy more features than the 'stock/built in' email app that came with my phone. The purple icon playstore yahoo email app is much more like a desktop way to look at yahoo mail, with all the features your desktop has.
anyway, using the play store "yahoo" email app is very
easy solution.
no more nonstop buzzers the minute you leave a wifi area...
AHHhhhhhhhh.....