i have a 7921 with app load id cp7921g-1.0.3.loads. The 7921 downloaded the configuring by tftp but soon it loses the wlan connection.
Now it is in connection failed status.
how to do for factory reset?
No, this is configured on an autonomous AP, but is really only mandatory if you have a -W model phone, which requires that 802.11d / world mode is enabled on the AP.
For losing connection, maybe could be BSS loss due to missing beacons or ACKs.
Would try 1.0.4 image, which is the latest.