[General Questions and Answers] Sagar_Patel:
Driver-USB-PC connection problem

Hope drivers are installed properly in your pc.

If you are going to use sp flash tool, Make sure SP flash tool is set to auto-detect com port, not manual selection

If you find that it is driver problem, following may help you.

Please note that there is nothing that much hard in driver installation as it is just to connect your device with your pc but because many users still face problem of driver installation, you can try following tricks!!!

It is observed by me that driver installation and adb interface problem do not happen in windows XP as eventually and generally it is happened in windows 7 and later…so, you can simply try on windows xp if you are able to do so…(you can use dual operating system too!!! Or good relation with neighbor/friends/colleagues/someone/all can be beneficial here!!!)

Note that all tricks here are not necessary to work, but it may still work for you….

Take one by one step, if the first step does not work for you, only then try next step. This is not all steps to be taken at once type guide…This is simply Try and error type tutorial/tricks…

There are following problems I have come to know regarding to driver installation and conflicts:-

Device is charging through usb cable but there is no usb option displaying on either device or no driver installation box/message/pop up appears in pc….

Missing sound of that usb-pc connection

Sound of disconnection after couple of seconds of connection

Adb interface is missing

Ok, sometimes changing usb connection type for example, from mass storage or mtp to camera, ptp, usb tethering or something else can bring adb interface…..

Try with different USB Cable. You can use original nokia or samsung tiny cable instead of cable having long length. Sometimes, length matters!!!!

Try in different USB Port.

Sometimes, you have to disable signature verification in your pc for proper installation of driver.

Had you disabled your antivirus before downloading, installing and while running your tools/softwares? You may need to do so…

Have you installed the software (or say, all associated softwares/tools) in C-System drive?, if not, then you should first install required software/tools in system drive that is usually C drive in Microsoft-Windows OS…or try after installing them on desktop.

Keep all necessary files/tools (driver files, flash tools, rom etc…) on desktop.

Download proper driver According to your model/device, According to chipset inside, According to Official site of manufacturer, Official site of chipset, through PC Suite/flash program of your device…

If the problem still not solve, you should try all available driver packages of your device one by one whether from official site of chipset inside your device, or any forum, adb, pdanet+ or foxfi, universal driver, VCOM Port driver, drivers from hexamob through play store, and find all possible packages and see if someone make positive result after installation…

If the problem still not solve, you should install remaining update packages of your system (PC) including all primary, secondary, essential, Non-essential updates….whatever, just install them all….reboot your pc…and see if problem is solved….

If you can connect the device but somehow found that device driver still not installed properly, just go to device manager in your pc, click on portable device, right click on your device and apply “Update driver”. Click on “automatically search” when a window prompt ask you.

If the problem still persists then,

Just remove all the drivers using usbdeview (I have given link also to download usbdeview in earlier post)

https://drive.google.com/folderview?id=0B511A2txfpAPbmwtQXZqbnVlT1U&usp=sharing

Install usbdeview and remove all the drivers

You can also fix this by showing the nonpresent devices in devicemanagement (google for show nonpresent devices for explanation)

Go to com ports, and delete all mediatek drivers except preloader driver. Now start over. It can help if you choose the same usb port where you had success last time.

Use Usbdeview to uninstall all the drivers before connection, restart the pc, Extract and keep driver zip files and other useful files/tools on desktop…just start your tool… and try to perform your tasks like backup…or restoring the backup…without worrying about that sound of disconnection you may listened after couple of seconds of connection or don’t even worry if you are just missing that sound of usb-pc connection….just try on your tool…

If still problem of driver installation persists, then simply use usbdeview and uninstall all drivers, restart your pc and try following steps:-

There are various ways to install proper drivers at the time of connecting the device with pc depending upon how you connect it.

Follow the procedure both with and without battery

Simply plug in via USB Cable

Connect by holding volume down button

Connect by holding volume up button

Connect by holding Power button

Connect by holding power and volume down

Connect by holding power and volume up

Connect by holding both volume up and down button

Connect by holding thrice volume up, down and power button

Connect by holding power and home button

Connect by holding power and menu button

Remember which method works and which drivers are installed

in LAN-Devices you may have different android device

Select/set drivers by hand and use the mtk usb driver, now Flashtool finds the phone

Suppose holding volume down method without battery works for you then what next you have to do is as below:-

1.TAKE THE BATTERY ,SD ,SIM OUT OF THE PHONE

2.HOLDING VOLUME DOWN CONNECT IT TO PC VIA USB(ONCE YOU HEAR A SOUND FROM PC YOU CAN RELEASE VOLUME DOWN)

3.OPEN DEVICE MANAGER(ON COMPUTER SEARCH IT OR CONTROL PANEL)

4.WAIT FOR 2-3 MINUTES

5.YOU WILL HEAR A SOUND & OTHER DEVICE WILL BE DISPLAYED

6.IN OTHER DEVICES ->MT65XX PRE-LOADER

7.RIGHT CLICK MT65XX PRELOADER

8.UPDATE DRIVER

9.LOCATE THE DRIVERS PROVIDED ACCORDING TO YOUR OS(VISTA,WIN7,XP)

10.IT WILL DO ITS STUFF

Install Mediatek drivers, preloaders, VCOM port etc…

Manually Install MediaTek USB VCOM Drivers

Requirement:-

1. Download MediaTek USB VCOM Drivers

2. Download USBDeview

Here is the link from you can get it:-

https://drive.google.com/folderview?id=0B511A2txfpAPbmwtQXZqbnVlT1U&usp=sharing

Procedure

(* Note: You might need to disable drivers signature verification in Windows for this to work smoothly.

If you want to turn off device driver signing in Windows completely, do the following.

Windows 7:-

1. Hit the Win+R keys together to open the run dialog

2. Type gpedit.msc to open the local groups policy

editor

3. Expand ‘Administrative Templates’ (it’s under ‘User Configuration’)

4. Expand ‘System’. Click ‘driver Installation’

5. In the right panel, double click on ‘Code Signing for Device Drivers’

6. Choose ‘Enabled’ in the window that appears.

7. In the underlying options, choose ‘Ignore’

8. This disables drivers signing in Windows 7, and now you can install unsigned drivers in Windows 7.

9. Click Apply, OK. Restart your computer to install unsigned drivers

Windows 8

1. Hold down the Windows key on your keyboard and press the letter C to open the Charm menu, then click the gear icon (Settings)

2. Click More PC Settings

3. Click General

4. Under Advanced Startup, click Restart Now

Note: In Windows 8.1, the ‘Restart Now’ button has moved to ‘PC Setting -> Update & Recovery -> Recovery.’

5. After restarting, click Troubleshoot

6. Click advanced options

7. Click Windows Startup Settings

8. Click Restart

9. After restarting your computer a second time,

choose Disable driver signature enforcement

from the list by typing the number 7 on your Keyboard Your computer will restart automatically.

10. After restarting, you will be able to install

unsigned drivers normally; however, Windows

will display a warning message. When the

warning appears, click Install this driver

software anyway. )

1. Install USBDeview and use it to uninstall all Vcom, Mediatek and Preloader drivers

1b. Extract the contents of the Mediatek USB VCOM file

2. In Windows, go to Control Panel and open Device Manager

3. Click any of the device groups (any of the items on the list) you see there, and then from Action menu, select Add legacy hardware

4. Add hardware wizard will be opened, click next

5. Select Install the hardware that I manually select from a list (Advanced)

6. Click next two times and click Have Disk button

7. Click browse and find where your driver's .inf file is, then select it (the .inf you'll select is located in drivers > USB Vcom driver > your OS) . Ensure to select the 64 bit .inf if your PC is 64 bit

8. Click Open and OK. You will see the drivers listed.

9. Select your driver there (select Mediatek Preloader USB VCOM Port)

10. Click Next and finish installing

11. If SP flash tool or other software still dont detect your phone then also install Mediatek DA VCOM (consider installing more from the list of drivers one at a time if need be)

Try in different PC

Sometimes windows XP works when windows 7 fails!!!

Case:-

It did the same thing with my MT6577 (Wiko Cink PEAX), so I connected it with a battery and without holding VOL+. Then "MT65xx preloader" appeared in device manager then disappeared (once). It is normal that it disappears. When you start Flash_tool and when you click Download (or whatever you want to do) THEN you connect the phone (in off state), and the flash operation will succeed.

Guess what? Once my Panasonic P81 could install driver and got detected after approx. 5 hours of continuous connection with win 7 x64!!! Meanwhile, I tried first usbdeview and then manually installation of mediatek driver but manual installation had failed as my p81 was only charging when it was connected with pc….So, mediatek – windows 7 conflicts….but, when I tried tiny (very small) nokia usb cable, it works instantly…

If you ever meet problem when you connect your android with your pc via usb cable and find that your android is charging but could not recognize or there isn’t that options of “USB connection” then just disconnect your android, power off it, remove battery, connect it without battery with your pc through usb, let it have some time to recognize your android or hear that voice of “usb connection” you were just missing…after that, insert battery and switch on your android…you are done!!!

Sometimes removing both sim cards and battery and then re-inserting them after a couple of seconds also works.

Try with different USB Cable

Try in different USB Port

Try in different PC

Sometimes windows XP works when windows 7 fails!!!

Use usbdeview to remove all the usb devices and then add your device

Find proper driver of your device:-

https://drive.google.com/folderview?id=0B511A2txfpAPbmwtQXZqbnVlT1U&usp=sharing