Cant clear device settings. Registering with a cell/Searching for WiFi network

Hello my imp is blinking red and i want to clear settings. tried many times with my iphone and it keeps blinking red… Searching for wifi/Registering with a cell!!
I have it with usb power and its an april board
Any suggestion?

Which version of the BlinkUp app do you have? Are you using the “Clear A Device’s Settings” button?

a) Are you following the instructions here? Electric Imp BlinkUp™ Troubleshooting Guide - YouTube (like blocking out external light)

b) If the device does not stop flashing during the blinkup process, then the red flashing LED could be indicating a hardware failure. If the device cannot access the SPI flash inside the device, you will see a flashing red too.