Thanks for your support to our product and sorry for inconvenience caused.
Would you please provide more information?
1. Where and when do you purchase your phone?
2. Which country are you from?
3. Would you please provide IMEI and CU reference to us via private message?
4. What's the current OS version?
5. Have you rooted your phone recently or installed any APPs?
Thanks and we will be thankful if you could reply.