i need link to download iOS 12.4 or 12.4.1 update to my iPhone 6S Plus

i cant because i have a bad internet connection ...

after downloading the update by iTunes and specifically

during

the processing the software a message appears saying that the update file has been corrupted because internet connection

I tried using my router and LAN cable direct to PC without router on the same network and the result was a message saying that the update firmware was corrupted during the download

In your opinion, changing my connection is the solution ?

I tried using my router and LAN cable direct to PC without router on the same network and the result was a message saying that the update firmware was corrupted during the download

In your opinion, changing my connection is the solution ?

Thank you so so much for your attention and try to help me ...

I tried all possible solutions until I deleted the security software and stopped even the firewall of windows and windows defender but still the same problem and on more 3 different computers on the same network

so sorry for my bad language

The download file is within one and a half to two hours to be downloaded by iTunes,

and at the end of the file processing phase a message appears saying that the update file has been corrupted because your internet

thank you again for helping ....

I will now go to a place with a better network and try and respond to you with the result

i cant because i have iOS 13 beta 8 and i need to downgrade to 12

Please help me ....