How to bring OTG feature on any android device of course its based on hardware but many mobile phones not coming with OTG enabled by the stock roms but you can made them to be used on the same device by flashing the any advanced custom roms with root access.
* This is only for rooted device.
WARNING
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I will not be held responsible for any damage to your device. Do not use for a long time, you may risk burning the device chip/motherboard due to the voltage supply in host mode.
What is OTG ?
USB On-The-Go, often abbreviated USB OTG, is a specification that allows USB devices such as digital audio players or mobile phones to act as a host, allowing other USB devices like a USB flash drive, mouse, or keyboard to be attached to them."
What are the requirements?
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• root (su binary) - ( if you have root please ignore)
• supporting kernel / kernel modules - (this application will tell you whether you have this or not once installed)
• USB OTG cable ( or direct card reader)
1. Install “USB OTG Checker” from Google Play.
before try this please check this link for already confirmed list where stated for working devices.
http://usbotghelper.wordpress.com/confirmed-devices/
is this your device already there in the list wow! you are good to go.if not do not worry follow step 2.
2. Process is very simple just open the installed USB OTG Checker and choose Check Device OS on USB OTG
which will tell you whether your device rom has the API or not if you get the green result yes you have it.go to step 3.
3. Choose Check USB OTG Signal which will ask you to re plug the OTG cable to check signals
if its tells green result yes you are good to go.
4. just exit USB OTG Helper connect your pen drive through OTG Cable into your device.
5. open ES File explorer (or any file explorer) navigate to “/mnt” and look for “usbstorage”
you should able to see your pen drive date over there.
Enjoy! the OTG
