If you have iPhone and want to use Yahoo Messenger directly from your iPhone or iPod Touch, you have to install Yahoo Messenger Chat Client for iPhone first. There are two options that would allow you to connect to Yahoo Messenger from your iPhone Smart Phone. First using
Yahoo! oneConnect™ and for free alternatively, you can use Free Multi Mobile Messenger that support iPhone such as ebuddy.
Free Yahoo Messenger for iPhone using Yahoo oneConnect™

To get Yahoo Messenger Chat Client on iPhone or iPod Touch using Yahoo oneConnect™ you have to download it on apple iphone store. To get Yahoo oneConnect™ from your Computer you should:
Launch iTunes® from you computer, then search Yahoo OneConnect™. And the rest do:
- Sync your iPhone or iPod touch with iTunes
- Go to your home screen on your device and tap on the Yahoo! oneConnect icon
- Follow the instructions to set-up Yahoo! oneConnect
You can also install Yahoo OneConnect from iPhone or iPod
The step should be like this:
- Click on the App Store icon
- Search for Yahoo! oneConnect
- Download Yahoo! oneConnect (it’s free!)
- Go to your home screen on your device and tap on the Yahoo! oneConnect icon
- Follow the instructions to set-up Yahoo! oneConnect
Yahoo Messenger for iPhone using eBuddy Multi Mobile Messenger

Beside of using Yahoo OneConnect you can also connect to Yahoo Messenger by installing Multiple Mobile Messenger such as eBuddy. Of course the Client should be support you iPhone. All you have to do just pointing your iPhone to www.ebuddy.com or at http://m.ebuddy.com (eBuddy lite Messengerr) and the you can start using Yahoo Messenger, and else.
Introduction of New Yahoo Messenger for iPhone
We just read that Yahoo has planned to launch a new Client of Yahoo Messenger for iPhone, you see the sneak a peek of this client by watching the Video Preview of YM for iPhone below. Enjoy it.
New Released! Yahoo Messenger for iPhone n iPod Touch Available Download

Yahoo Finnally Release a Brand New Yahoo Messenger Client for iPhone. Here We quoted of some features available in YM for iPhone:
Instant message: Send text messages back and forth with your friends, including emoticons and web links.
Photo sharing: Take a photo on your iPhone and send that, or grab one from your photo gallery to share.
Stealth settings: Sign in as invisible, or change your status to invisible once you’re in the app.
Custom status message: Enter a custom status message for your friends to see. You can even include a web link with it.
Recent conversations archive: Under Messages, tap a contact and you’ll see your most recent conversation. You can type in a message from there to start chatting again
You can download Yahoo Messenger for iPhone on iPhone Store here.
Download YM for iPhone
Tags: Chat Clients, Mobile Messenger, Yahoo! Messenger
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May 27th, 2009 at 11:14 am
hi
December 31st, 2009 at 8:32 pm
I have downloaded the free application of Yahoo messenger from itune application store. It shows in the application section in my itune software but I dont know how to install if ? It would be a great help from your side if You reply with step by step procedure of installing application on my iphone touch.
February 13th, 2010 at 7:43 pm
hi
March 3rd, 2010 at 4:18 pm
Satongs
March 3rd, 2010 at 4:20 pm
Nectarios-tasos
April 28th, 2010 at 4:34 am
Hi
i’ve downloaded yahoo chat on my iphone and whenever i touch the icon on the touch screen, i’ll sign in automatically and can get in contact with my friends online but one little problem here is…how do I sign out of it at the end of my conversation. If I leave in online, will it be taking up my data usage time even though i’m not on chat with friends.
Looking forward to yr favourable reply. Thanks.
June 26th, 2010 at 4:40 am
haiiiiiiiiiiiii