Hi to all, i've got the same problem. I upgrade the last firmware and it was better during a week. After exactly one week, this problem occurs again. The phone disables wireless itself and it's impossible to reactivate it.
EDIT: We all need to downgrade the firmware version to the 11.0(3)SR4 ;(
I just found this on the firmware webpage
DEFERRAL ADVISORY NOTICE
Dear Cisco Customer,
Cisco engineering has identified at least one serious software issue with the release which you have selected that may affect your use of these software. Please review the Deferral notice below to determine if the issue(s) apply to your network. Deferred images are no longer be available for download. Customers are urged to upgrade to the recommended solution image or most current software version.
For more comprehensive information about what is included in this software, please refer to the Cisco software Release Notes, available from the Product Selector tool. From this page, select the product you are interested in. Release Notes are under General Information on the product page.
| Software Type |
Software Affected |
Software Solution |
Comments |
Affected
Release
Number(s) |
Affected
Image(s) |
Solution
Release
Number |
Replacement
Image(s) |
| Session Initiation Protocol (SIP) Software |
11.0(3)SR5 |
all images |
11.0(3)SR4 |
all images |
This release has been deferred due to a secure storage access issue impacting WLAN configuration. As a result of this defect and action by Cisco, release 11.0(3)SR5 is no longer a recommended release for Cisco Wireless IP Phone 8821. Cisco suggests the following for all customers using the Cisco Wireless IP Phone 8821: Any customer who is looking to upgrade to 11.0(3)SR5 for their Cisco Wireless IP Phone 8821 should defer from using that release and upgrade their phones to that release which contains the fix for CSCvg46824. In case 8821 are already upgraded to SR5, there should be no concern or action needed. In scenario, if customers has already down loaded SR5, and want to continue with SR5 installation due to defects addressed, Cisco suggest following instructions for 8821 upgrade to SR5 firmware image. Recommendations: 1. Get 8821 phone on desired network, 2. Ensure desired phone profile is created on Call Manager and phone is provisioned as necessary 3. Upgrade device to firmware SR5 4. Ensure phone is on customer WiFi; re-provision as necessary 5. Reboot & Reset Phone to ensure there are no issue with phone boot up and registration. 6. Support Question For any other issues engage Cisco support team for the help. 7. Do not give new 8821 phone to an end user as it comes out of box and perform a remote update, 8. Ensure 8821 firmware is upgraded to SR5 before handing if off to an end user. |
Reason for Deferral:
DDTS No(s):
CSCvg46824
Maintenance DDTS[These are defects that did not cause this advisory, however fixes are included in the solution]:
none
Disclaimer:
In order to increase network availability, Cisco recommends that you upgrade affected images with the suggested replacement software images. Cisco will discontinue manufacturing shipment of affected images. Any pending order will be substituted by the replacement software images.
PLEASE BE AWARE THAT FAILURE TO UPGRADE THE AFFECTED SOFTWARE MAY RESULT IN NETWORK DOWNTIME.
The terms and conditions that governed your rights and obligations and those of Cisco, with respect to the deferred software will apply to the replacement software.
