how to upgrade IOS iphone 4 to IOS 9???

So how can I download apps

Go to the App Store and download them.

That is as long as the apps will run on iOS 9.

If not, you buy a new iPhone to replace your obsolete one.

You can update it with itunes.

If you are saying you are hopeful that the obsolete iPhone 4 will ever be able to upgrade beyond iOS 7.1.2 then don't hold your breath because the chances of that happening are right up there with a snowball in you know where. It doesn't have sufficient hardware to run anything newer.

No way, if the iPhone 4 cannot support iOS 8, then it definitely wouldn't support iOS 11 because it uses an A4 chip which isn't capable of running iOS 11. It couldn't even run on iPhone 4S, iPhone 5, or any other 32 bit devices, let alone an iPhone 4.

iOS 9

I want upgrade ios 9

HOW TO UPDATE MY IPHONE 4 IOS9

You can't. 7.1.2 is the highest that phone can run. If you need a newer version of iOS, you will have to buy a new phone.

You cannot upgrade that iPhone 4 beyond 7.1.2 That release of iOS is the last one that is compatible with your iPhone. The only way for you to get a newer release of iOS is to buy a newer iPhone.

iPhone 4 abandoned after only 6 years...

Well, actually it still works with 7.1.2 ...

but now Apple says it will no longer repair iPhone 4.

and will no longer give you any cash when you send it in for recycling.

You can find that information at http://www.apple.com

Gerald Edgar wrote:

iPhone 4 abandoned after only 6 years...

Well, actually it still works with 7.1.2 ...

but now Apple says it will no longer repair iPhone 4.

and will no longer give you any cash when you send it in for recycling.

My first cell phone was a Sprint Qualcomm phone back in 1997 or thereabouts. I've had a cell phone ever since, and I cannot name a single one that was still actively supported after a few years. They still worked, as do people's iphone 4 models, but they were not actively supported.

Quite honestly, the reason for that is not wholly the industry but also consumers. Consumers constantly demand new features, new functions, faster devices, longer battery life, etc, etc. That in part is why cell phone manufacturers update their models every 10-15 months. And consumers flock to stores and online to buy the latest iPhone or Samsung or whatever flavor of device they prefer. That consumer demand has a lot to do with the very short technical lifespan of smart phones, tablets, computers, and other tech.