I have been testing the softdevice codes on NRF52840 DK with NRF52840 SDK 15.2.0 which is working perfectly. But when i put the same test code in our custom board having BT840 it is not working. I am using the Ble_app_template example for s140 as test code for softdevice. Now when I flash the hex file provided by Fanstel i.e BT840_AT_3in1PC181113.hex on the same custom board it is working perfectly, So is there any particular changes needed for BT840 chip in the SDK of softdevice, please guide i am new to nRF environment and recently 3 products are under development using BT840 chip.