1. Go to the bottom of this post.
2. Click on the given link.
3. Wait for a while to start the download. When it will do install it in your Operating system.
4. Connect your Mobile with your PC via USB data cable.
5. Then follow some instructions given by your computer.
6. After that simply start flashing your phone.

About the phone:

Nokia Lumia 830 smartphone was launched in September 2014. The phone comes with a 5.00-inch touchscreen display with a resolution of 720 pixels by 1280 pixels at a PPI of 296 pixels per inch.

The Nokia Lumia 830 is powered by 1.2GHz quad-core Snapdragon 400 processor and it comes with 1GB of RAM. The phone packs 16GB of internal storage that can be expanded up to 128GB via a microSD card. As far as the cameras are concerned, the Nokia Lumia 830 packs a 10-megapixel primary camera on the rear and a 0.9-megapixel front shooter for selfies.

The Nokia Lumia 830 runs Windows Phone 8.1 and is powered by a 2200mAh removable battery. It measures 139.40 x 70.70 x 8.50 (height x width x thickness) and weigh 150.00 grams.

The Nokia Lumia 830 is a single SIM (GSM) smartphone that accepts a Nano-SIM. Connectivity options include Wi-Fi, GPS, Bluetooth, NFC, FM, 3G, and 4G. Sensors on the phone include Compass Magnetometer, Proximity sensor, Accelerometer, Ambient light sensor, and Gyroscope.

Now you can download your tool from the below by just a click. Just press the “Download” button to start a download in one click. Before flashing your phone don’t forget to take a backup of your whole phone data to your PC or any other safe place. Because after a successful flash you are going to lose all the phone data you will lose your contacts, messages and all other important files from the phone. So always take a backup of your phone before flashing it.
Download Here