Getting the required information

ECID

1. Connect your device to your computer.
2. Open iTunes and open the "Summary" tab
3. Click on the serial number twice and it'll show the ECID
4. Right click on it to copy

Identifier/Device Model

1. Use ipsw.me/device-finder

Internal Name/Board Configuration

1. Download and open the BMSSM app from the app store.
2. Go to the system tab and it'll be called the model

Saving blobs for beta versions

1. Go to theiphonewiki.com/wiki/Beta_Firmware
2. Click on the firmware you want to save beta blobs for
3. Find the firmware you want to save blobs for