How to Turn on Instagram Notifications on an iPhone Through the Settings App
The Instagram app’s settings enable you to dictate whether or not it should notify you on what topic (likes, comments or mentions) and from whom (everyone or people you follow). But unless you configure your iPhone to alert you also, you will see only your desired notifications when you launch the Instagram app. To change this, tweak your iPhone’s Notification Center settings.
1 Choose an Alert Style
Tap your “Settings” app and then touch “Notification Center.” Scroll down to tap the "Instagram" app icon and reveal its notification options. Select an alert style other than None. Bear in mind that a Banner signal appears only fleetingly on your iPhone’s screen while an an Alert remains there until you tap it away.
2 Turn On Alert Style Switches
For additional Instagram alerts you can see or hear on your iPhone, toggle the Badge App Icon and Sound switches to “On.” Henceforth, your iPhone will post the number of new Instagram notifications that await you on the app’s icon, and a tone will signal each incoming notification.
3 Enable Other Alert Options
Your iPhone has a Notification Center that collects your notifications in one spot so that you can read or re-read them when you have time. If you wish, toggle the “Show in Notification Center” switch to “On” to hold your Instagram notifications there for later review. Likewise, switch on “Show in Locked Screen” to view your alerts even while the iPhone is locked.