If anyone from Spark reads this there appears to be an issue with the latest HG630bV100R001C55B023_upgrade_main software for this router.
At Xmas I received a new one with this version of software but was unable to change any configuration settings. I went on to the Spark site and downloaded the latest from there which was V100R001C55B021 and down graded the router. I could then change the settings.
Last week I was having WiFi issues so I downloaded the now latest version HG630bV100R001C55B023 and installed it. Now I couldn't change any configuration again , not even turn off WiFi or default the router. Ended up down grading it again ..