How to DFU the SD from 7 to 8

[jimlin]

Hi all,

I want to upgrade current SD from 7.0 to 8.0 by DFU, and try it as followed:

1.Use the nRF Toolbox 1.12 in Android; 2.Select 'Soft Device' as the file type and load SD8.0 hex; 3.Select the DfuTarg, and click the upload button; 4.But it return Error with remote DFU not supported(3);

There is no problem on DFU application yet. So, I am not clear on what's wrong on this.
Is it need to use the distribution packet ZIP way? If YES, I see the info show it should use the NRF UTILITY which is a part on MCP 3.8.0+, could you guide me how to create such ZIP file by any documents?

Thanks a lot.

[jimlin]

Could anyone show me the guide?