iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
T-Mobile USA Rolling Out Software Update for Existing Unlocked iPhone Customers
As the carrier notes in its support forum, the update enables a number of features, including LTE support where available, ahead of the official launch of new iPhone 5 sales for the carrier next week.
Enables the following:Earlier today, T-Mobile began taking pre-orders for iPhone 5 customers, with the official launch set for next Friday, April 12.
- Visual Voicemail
- 4G network indicator
- Commercial Mobile Alert System (CMAS)
- AWS LTE (T-Mobile and officially unlocked AT&T iPhone 5 only)
- HD Voice (T-Mobile and officially unlocked AT&T iPhone 5 only)
- AWS HSPA+ (T-Mobile and new 2013 AT&T iPhone 5 only)
- MMS Settings
- Personal Hotspot Settings (Smartphone Mobile Hotspot)
- APN settings for LTE connectivity
- My Account bookmark