Please give me iOS 14.0 for iPhone 6s

Assuming your iPhone is a model 6s+ (not a 6+, which doesn't support iOS versions beyond iOS 12.5.5), if you'be able to update it it will get the current (15.6) iOS version, including all bug corrections, new features and security patches provided in the previous versions.

That said, assuming you're trying to update your device wirelessly, and bearing in mind that to perform such a procedure you need to connect your device to a reliable and fast Wifi Network with Internet access (no cellular data, unless you use a 5G network, no personal hotspot on your device, no VPN connections are admitted, no Low Power Mode enabled, and I suggest that you keep the device plugged into power during the whole update process), read this support article:--> If your iPhone, iPad or iPod touch won’t update

Also, make sure your device is NOT running a Beta operating system version. Should be this case, you need to remove it before installing any official iOS/iPadOS releases, as per these instructions:--> How to uninstall iOS or iPadOS beta software - Apple Support.

DO NOT forget to create a full backup of your device before updating its operating system, and keep in mind that, depending on the available storage on your device and/or on your wifi network speed, it might take 30-60 minutes to complete the entire update process.

If the issue persists or if the iOS version currently running on your device is very old (this might be the culprit if, as you stated in your product list, your iPhone is stil running iOS 13), try to update it via computer (if you don't have a computer borrow one from your friends/neighbors, or ask for help at an Apple Store or Authorized Service Provider), then learn how to update your device manually if you're using a Mac with macOS Catalina or later, or if you're using a Mac with macOS Mojave or earlier or a Windows PC.

If you still get no help, contact Apple Support directly, using this link:--> Get Support

Regards

Giulio

sunday106 wrote:

My phone is iphone6s+ and I need iOS 14.0 on it to be able to download Facebook and google chat

I suggest that you identify your iPhone model correctly, using these instructions:--> Identify your iPhone model - Apple Support, then take a look at this compatibility chart:

Great! Then you should be able to update it as per the suggestions I posted.

Is it actually a 6s+ or a 6+? The s is crucial to this discussion. What happens when you try to update? What messages do you see?