LG-LK460 Sprint, add APN

[vphuc81]

LG-LK460 unlocked with SimUnlocker(Sprint), but APN grey out.
Already tried write unlock data but still not working.
Please help me to add APN.
If cannot add APN then unlock the device is for nothing.
Thanks

 

[Mohsin-*]

LG-LK460 unlocked with SimUnlocker(Sprint), but APN grey out.
Already tried write unlock data but still not working.
Please help me to add APN.
If cannot add APN then unlock the device is for nothing.
Thanks

Click on Write Data and Select APN , please send video for this operation

 

[vphuc81]

Click on Write Data and Select APN , please send video for this operation

Thank you for you reply.
Here is the video. I tried Write DATA but the APN not showing. This is LG Tablet LK460.