Gigaset S700 H PRO Manual page 60

Handset
Start the firmware update manually
Settings
Update OK
The update process may take up to 30 minutes. During this time, only restricted
handset use is available.
Checking the firmware version
Settings
Current Version
60
OK System
OK . . . if there is new firmware, the update will start
OK System
OK . . . the firmware version of the handset is displayed
OK Handset Update
OK Handset Update
OK
OK