4G LOCK is a free Android application developed by Davik Dev that allows you to lock your chosen network, such as 4G LTE, on your smartphone. With this app, you can force your phone to only run on 4G mode networks or switch to other networks like 3G or 2G as you choose.

One of the standout features of 4G LOCK is that it provides access to advanced network information and allows you to control all network modes on your mobile. Additionally, the app gives you access to your Dual SIM settings control.

It is important to note that the application will not work if there is no 4G network available in your area or if your smartphone does not support 4G networks. Also, on some smartphones, the app might not work, so it is advised to try it first.

Overall, 4G LOCK is a useful utility tool for those who want to lock their 4G LTE network and have more control over their mobile network settings.