Try to reboot your MEIZU C9 phone. Remove the SIM card (s) and insert it/them again. If the problem persists, purchase a new SIM card. Check if there is any damage to the SIM card or SIM card holder. Go to Network Settings and check if the specified SIM is activated. If Airplane Mode is enabled by mistake, disable it. Press and hold the Power and Quieter keys to restart the device in bootloader mode. Connects your smartphone to your PC via a USB cable. Opens Windows Explorer and searches for the previously downloaded firmware in the ADB Tool folder. Double-click on the file flash-all .bat and wait until the process is completed. Load More Reviews…. Samsung SM-C9000 Galaxy C9 Pro reviews, pros and cons. Liked: Slim form factor, Separate SIM card and SD card slots, Good call quality Disliked: Wonky fingerprint scanner Boot in Download Mode: Charge the phone for at least 30 minutes. Press and then hold the Home and Volume DOWN keys, then press and hold the Power key. When the Samsung Galaxy logo shows on the Turn the phone off. Press and hold the power button past the name appearing on the screen. Once the Samsung logo appears, release the power button and immediately press and hold the volume down Press and hold the Power key. When ‘Samsung Galaxy S6’ appears, immediately release the Power key and then press and hold the Volume Down button. Continue holding the Volume Down button until To boot in recovery mode. Press and hold the power button to turn off your Galaxy S9. After turning your phone off, press and hold Bixby button (right below the volume keys), Volume Up, and Power qfE8TBE.

samsung c9 pro restart problem