I have Android 5 Huawei phone which reports that Android 6 / EMUI 4 update is available. I selected the download option and the download happens up to 100% but then it springs back to the 90% downloaded status and continues to download the remaining 10% up to 100% and then it springs back again and again? How to solve this situation? My phone has around 3-4GB free space and the update is 1GB, so, there is enough space. How can I troubleshoot this and complete download and update?