I have Nokia Lumia 630 and it works well with nRF51822-EK but only with SDK nrf51822_v5.1.0.36092 and SoftDevice 6.0.0. Now I decided to try DFU OTA. I programmed bootloader, SoftDevice 7.0.0 and HRM from SDK nrf51822_v6.0.0.4368. I was not able to connect device to phone. Whereas I can connect nRF51822-EK to usb dongle with MCP and it works fine.
What different in S110 that connection does not occure in phone?
Update 11.07.2014.
I have no the same problem with sdk5.2.0 and s110 v6.0.0. Nokia connect to the device and I can do DFU OTA. I would like to use s110 v7.0.0 instead because I need to update bootloader too.