Issue with iphone DFU

[BIPIN]

Hi,

Whenever i m trying to upgrade my application using iphone with binary file then i get "unsupported DFU" error. what is meaning of this error and how can i resolve this issue?

Thanks Bipin Patel

[bjorn-spockeli]

Which SDK and SoftDevice version are you using? Is this for the nRF51 or the nRF52? When specifically does the error occur during the DFU process?