[UPDATE: Issue fixed] T-Mobile iPhone 6, 6 Plus, and SE users shouldn't install iOS 10 yet

UPDATE: Apple has fixed the issue that was causing the connectivity loss on T-Mobile for the iPhone 6, iPhone 6 Plus, and iPhone SE. If you've already installed iOS 10, go to Settings > General > About and make sure you install the new software update, which will fix the issue for you. If you have followed T-Mobile's advice from yesterday and refrained from installing iOS 10, then good news - you can now safely update. Our original story follows.

If you own an iPhone 6, iPhone 6 Plus, or iPhone SE and use it on T-Mobile, don't update to iOS 10. Not yet, anyway.

The word comes straight from the magenta carrier itself, and its outspoken CEO John Legere. The reason is that after you update your device it may in fact lose connection to T-Mobile's network. That's obviously not something anyone would want, so the advice is to refrain from making the jump to iOS 10 until the underlying issue gets fixed.

Apple is working to resolve the problem, and the fix should be out within 48 hours - so you don't have to wait too long to be able to safely install iOS 10 on your T-Mobile iPhone 6, 6 Plus, or SE. If you have already updated, then a temporary fix for the network disconnection bug is to restart your handset when it happens. One restart won't cure it forever, though - you'll have to perform it every single time your iPhone disconnects, unfortunately.

Source | Via