U8815
Maintenance Manual
5 Software Upgrade
Issue 1.0 (2012-02-13)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
10
Figure 5-1
Upgrade process diagram
7.
After the upgrade is completed, the handset restarts and the NV items are restored.
8.
After the main upgrade pack is upgraded, upgrade the vendor upgrade pack using the
same method.
If the handset cannot be properly powered on, follow the following two methods to forcibly
upgrade the handset:
1.
Install the battery to the handset (if the screen is splashing, remove the battery and wait
for five seconds before installing the battery again). Press
and
Volume –
, and
press the
Power
key, the handset will start SD forcible download. The specific download
process is similar to the project menu download.
2.
When the handset has not a battery installed, press
Volume +
and
Volume –
, and
connect the handset to a charger, the handset can also start the SD forcible upgrade. It is
recommended that you use a charger to perform forcible upgrade. If the download still
fails, replace the SD card and try forcible upgrade again.
