T-Mobile issued a stern warning to its customers against downloading and installing the new iOS 10 update to their existing 6, 6 Plus and SE iPhone models. According to the T-Mobile website, doing so will, cause the handset to "lose connectivity [to the T-Mobile network] in certain circumstances." Once that happens, the user can only re-establish their network connection by fully powering down the phone and restarting it. That said, the company does expect Apple to push a corrective patch live within the next 48 hours.
Update: On Thursday night, T-Mobile announced that Apple had released its patch for the connectivity issue. If you had already downloaded iOS 10 (and were therefore at risk for this issue), go to Settings > General > About, to install the fix. If you hadn’t yet installed the new OS, feel free to do so without fear of having your cell service randomly drop.
Via: Verge
Source: T-Mobile
via Engadget
T-Mobile tells iPhone owners not to install iOS 10 just yet (Updated)