what should i do ??

[amani10191]

When i open the photos app it will only stay open for 6 seconds and then closes on its own in my Lumia 640 XL and also the missed called won't appear in the action centre though I activated that in the settings

 

[Desmond Antwi]

Backup and use Windows Device Recovery Tool to roll back to windows 8.1 Denim log in to your accounts and then choose insider preview fast ring update it back to windows 10 build 10586.71 that build has lots of fix and everything works perfect on my Lumia 640XL

 

[karan25i]

From last 2 builds im not able to set brightness level..hard reset does not work ..tried4 times.im on .71.plz help..screen battery consumption is more than 70%