Hi, i'm using iphone 6plus i have network issue, im using airtel sim but its always shows me idea network i had reset network setting but issue was not solve please help ??

Contact your carrier and ask for help.

Also, you can try these steps:

Try to reset your device. This won't delete your data stored on this device.

• Press and hold the Sleep/Wake button
• Press and hold on the Home button
• Keep holding both buttons until the display turns off and back on with Apple logo on it.

Alternatively, you may go to Settings - General - Reset - Reset All Settings

If this does not help, restore your device to factory settings. Note that this will erase the data from your device.

Take a look this Apple Support article: Use iTunes to restore your iPhone, iPad, or iPod to factory settings - Apple Support.

Hard reset is not working.