USB port not working, any way to relock bootloader without using a computer?

the microusb port on my v10 stopped working all of a sudden and wont be detected by my computer and wont fast charge, only regular slow charging. i want to be able to exchange it for a new one but i need to relock the bootloader. any way to do this without a computer?

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Usb not recognised when connecting to computer

Please help me out somebody. Whenever I connect my mate 7 with pc, it shows usb not recognised. Some info :
1. All drivers are fine . Nothing wrong in pc
2. Tried usb debugging on off but no effect.
3. Factory reset the phone. No effect. Currently I am on 4.4..4 firmware with cwm recovery installed.
4. I also got replaced its charging dock port but then also it is no working.
5. Changed usb cable too . no effect.
6. Actually I want to update my phone to 5.0 or 6.0 but for I should be on stock recovery which can only be flashed in fastboot mode . But as usb is not working cant flash it in fastboot mode.
So please tell me is there any way to flash stock recovery without using usb cable ?
Or any otherway I can update my phone to lollipop or marshmallow over kitkat without stock recovery and data cable ?

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