how to install whatsapp messenger for ios 4.2.1 iphone 3g

You purchase a newer iPhone, get iOS 4.3 or higher, and then go into the App Store and download it.

You don't. Whatsapp is not compatible with iOS 4.2.1.

There is no solution.

The iPhone 3G has a maxium iOS of 4.2.1.

Whatsapp requires a minimum iOS of 4.3.

You CANNOT use whatsapp on an iPhone 3G.

That's why I said 'PURCHASE A NEWER IPHONE THAT CAN RUN IOS 4.3 OR HIGHER'.

There is no iPhone 2G.

The solution is to buy a newer phone that meets the minimum requirements for the app you want to use.

TJBUSMC1973 wrote:

There is no iPhone 2G.

The original iPhone is commonly referred to as iPhone 2G.

ravinandan wrote:

but before i have a iphone 2g and whatsapp is working there how.

You have an outdated version of Whatsapp that was still compatible with an older version of iOS. Only the latest versions of apps are available for download.

I'm aware of that. But I don't like to perpetuate inaccurate information.

OP needs to grasp the concept of outdated hardware.

It is not, and has NEVER been called the iPhone 2G by any legitimate source. You are using improper slang.

Bottom line? Whatsapp requires iOS 4.3 or HIGHER.

Your 3G will not use iOS 4.3.

Unless you have a previous copy of this App, then you

CANNOT USE WHATSAPP ON YOUR IPHONE 3G.

If your original iPhone is running Whatsapp, it's either jailbroken, or it's using a version of Whatsapp that runs on iOS 3.1.3, which is the maximum that the original iPhone can run.

Get it?

you means iphone 3g cannot be used anymore, right? cause all apps from apple store is support ios 5 till 7.. any suggest for iphone 3g?