Note
Follow the instructions on how to flash the device carefully below
I will not take responsibility on whatever may happen to your device.
Make sure you are downloading the exact ROM of the device you want to flash because
flashing a wrong firmware, can render the device useless
(can’t power on, can’t charge and will not be detected by a computer)
How to flash SPD devices with Research Download or UpgradeDownload Tool
Download an install SPD drivers from here
Download the latest version of Research Download or UpgradeDownload from here
Extract and Launch Research Download/UpgradeDownload Tool
Click on load icon
Navigate to the folder containing the firmware
Select the pac file in the firmware folder
Wait for it to load in Research Download/UpgradeDownload tool
Click Play/Start button
Now connect the device to PC while holding volume down key
(Some new devices requires holding volume up key)
Wait for flashing process to complete
When you see Passed! Then note that the flashing or upgrading process is complete
Disconnect and boot up device
You can also use tools like MiracleBox, infinity CMII, Volcano, GPG Dragon etc to flash or upgrade SPD devices
INFINIX SURF X511 QUICK SPECS
5.0″ WVGA Touchscreen, 480 x 854 pixels
145 x 73.2 x 10.1 mm
Android 5.1 Lollipop
ARM Mali 400 Quad core with 1.2GHz Processor
SC7731
1GB RAM
8GB Internal Memory
up to 32GB microSD
5MP Rear Camera, LED Flash, Auto Focus
2MP Front Camera
Dual SIM
EDGE , GPRS – 850 / 900 / 1800 / 1900MH
WIFI 802.11 b/g/n
bluetooth 2.1
36000mAh Battery
INFINIX X511 STOCK ROM
X511_W501_L_FR_20160612