https://devzone.nordicsemi.com/f/nordic-q-a/13016/issue-with-iphone-dfuHi, Whenever i m trying to upgrade my application using iphone with binary file then i get &quot;unsupported DFU&quot; error. what is meaning of this error and how can i resolve this issue? Thanks Bipin Patelen-USTelligent Community 13Mon, 11 Apr 2016 11:53:36 GMThttps://devzone.nordicsemi.com/thread/49603?ContentTypeID=1Mon, 11 Apr 2016 11:53:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bf5dc24c-7dee-463c-9659-22f0b57a66f6bjorn-spockeli<p>Which version of the nRF Toolbox app are you using? I think you have to provide a hex file and not a bin file.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/49602?ContentTypeID=1Thu, 07 Apr 2016 13:51:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8a198237-e9bd-4989-92f5-e4b819d071b5BIPIN<p>Hi Bjorn,</p> <p>I am using nRF51822_AC, SDK 6 and S120. After Opening DFU in nRF Toolbox and browse application binary file and select device then i found &quot;unsupported DFU&quot; erro on screen.</p> <p>Thanks Bipin Patel</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/49601?ContentTypeID=1Wed, 06 Apr 2016 11:44:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0297c2e5-a11a-4fdc-9380-07c79aa1a6a0bjorn-spockeli<p>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?</p><div style="clear:both;"></div>