Emergono da alcuni documenti presenti sul portale di Microsoft riservato agli sviluppatori nuovi dettagli sulle funzionalità che saranno implementate sull'aggiornamento GDR1 di Windows Phone 8.1, in versione preliminare già nelle mani delle case produttrici.
Oltre alla possibilità di organizzare le applicazioni in cartelle, Windows Phone 8.1 GDR1 permetterà la gestione di 'smart cover' come quelle di LG
G3 ed HTC
One (M8), associando particolari eventi all'apertura o alla chiusura del flip. Windows Phone 8.1 GDR1 dovrebbe permettere inoltre di gestire schermi con una risoluzione di 1280 x 768 punti o 1280 x 800 punti sul dispositivi che utilizzano tasti virtuali per la navigazione, di gestire la funzionalità voice over LTE, lo streaming Bluetooth tramite codec aptX e schermate di blocco personalizzabili dai produttori.
- Support for 1280 x 800 WXGA resolution
- Diagonal screen sizes of 6.01" to 7" are now supported for the 1280 x 768 WXGA resolution
- 540 x 960 native qHD resolution is now supported in addition to the ability to scale from HD or WVGA resolution to qHD
- Diagonal screen sizes up to 6" and on phones that use the MSM8x12 applications processor now support 540 x 960 qHD resolution
- Dual SIM – C + G radio type is now supported for dual SIM phones
- Bluetooth – PAN (personal area network) 1.0 profile, aptX codec support for A2DP, and browsing support for AVRCP are now supported
- Support for a Store live tile when the tile is medium-sized
- The size of the Store tile has been standardized for all layouts and some tiles have changed places on the Start screen.
- Support for folders.
- Enable a phone cover app to launch when the phone cover is closed and specify the default setting for the lock screen's auto unlock setting.
- Cortana – Add a phone book entry for Cortana to allow users to initiate speech from a car that doesn't have support for activating speech on the phone that is connected over Bluetooth.
- Network Time Protocol support – Automatically set the time, using an NTP client, in a Windows Phone device that doesn't support NITZ or when cellular data is not available.
- Voice over LTE (VoLTE) support
- OEMs can implement a custom lock screen
- OEMs can preload the Files app
- Added a note that all Wi-Fi Sense settings must be on unless Microsoft executive approval has been granted for specific mobile operator requests.