Hi Yamunadevi,

There is no need to install any other third-party application to increase the Airtel 4G speed on your Galaxy J7 Prime. And, installing any app will make your phone slow, it can't increase speed as speed depends upon the network hardware in your phone  not on the software which you use.

You can do these simple things to increase your 4G Network speed:-

• Check if the LTE ban is enabled or not.
• Change API.
• Use phone at a height.
• Try changing your operator from Airtel to Jio or Vodafone.
• Upgrade your device if still the speed is low.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!