• Select Serial Port

Please Select Serial Port Sigmakey Forum. 5/12/2017 0 Comments After that, connect the device to your computer using the USB cable.

Select Serial Port

Before servicing the phone, please make sure that:. You use. Battery charged more than 50%. All the side programs, that may interfere with the phone, are closed. Phone’s cable and device itself should not be disconnected or disturbed until the procedure is fully completed. Phone's connection:. Via USB: connect phone to USB port placed on the backside of PC (motherboard's USB port) Do not connect or disconnect other USB cables into the PC during the actual work with the phone.

Via COM: use recommended only. Avoid using any kind of USB HUBs and long USB cables. Use the shortest-length USB cable available. Phone has stock (factory) firmware version.

SIM card is removed.