"This application requires iOS 13.4 or later"

What phone do you have? If you're on a 3G cell network, than I'm guessing you have a very old phone.

An iPhone 5 can't be updated beyond 10.3.4.

An iPhone 5S, 6/6plus can't be updated beyond 12.5.6, it doesn't have the hardware needed to run anything higher.

If you need a higher iOS version, you will have to purchase a newer phone.

Hi

Iphone7

how

My IPhone 6 version is 12.5.5

I can't download Facebook and YouTube beacause app version is very high So please tell how can i do

An iPhone 6 can't be updated beyond 12.5.6, it doesn't have the hardware needed to run anything higher.

If you need a higher iOS version, you will have to purchase a newer phone.

Use the web versions of Facebook & YouTube

This application requires iOS13.4 or later.

The previous answers in this post apply to you as well.

Ios 13.4

Your iPhone 6 cannot run anything higher than 12.5.7

Borrow an iphone from your friend which is running on iOS 14 or later and sign in with your Apple ID, then download the app on your friends phone, If you see on your phone you should see a download option, Hope it helps.

https://www.youtube.com/watch?v=VV_8NQi1xRc if you prefer watching(not my channel)

I tried and it worked.

Me too 😢

Yes

requires ios 13.4