The iPhone SE iOS 12.2 update is an important milestone update, but the latest version of iOS 12 causing problems for some iPhone SE owners. If you’re thinking about moving your iPhone SE to iOS 12.2, make sure you’re fully prepared for the move.

Apple’s iOS 12.2 update is a massive upgrade and it could have a noticeable impact on your device’s performance.
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https://www.gottabemobile.com/7-things-to-know-about-the-iphone-se-ios-12-update/