I’m using this meta tag
meta name=“viewport” content=“user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height, target-densitydpi=device-dpi”
My iPhone running iOS 7 has no problems with that meta tag, and displays my content properly. It doesn’t have issues with any variation of that tag, either.
My HTC Droid DNA running Kitkat (4.4.2) displays the content so small as to be unreadable. It stays that way for a couple seconds, then the content is displayed at the proper size for a couple more seconds, (as if I’d zoomed in), and then the content goes back to the original size (too small to be able to read).
Trying to figure out why this is happening…