Note that the error code 800705B4 occurs during updating and you will need to clear the cache to start again. This means you have to try deleting your browser, map, and search history to start again. Below you will find the process to do this and attempt to update you mobile phone again.
Error Code 800705B4
If your phone is connected to your computer, disconnect it.
On Start, flick left to the App list.
Tap Settings, then flick to Applications.
Tap Internet Explorer > Delete history > Delete.
This deletes your browser history, saved cookies and passwords, and temporary Internet files from your phone.
Press the Back button to return to Applications.
Tap Maps > Delete history > Delete.
This deletes your map search history, pins, and downloaded map images from your phone.
Press the Back button to return to Applications.
Tap Search > Delete history > Delete.
This deletes your search terms history from your mobile phone.
Now connect your mobile phone to your PC using the USB cable that came with your mobile-phone, and then try to update your phone again.
See Error Code 800705B4 as well as Error Code 80181197 and Error Code 801811A5. Finally there is also Error Code 800704C7 as well.
