How do I change "Sent form Yahoo! Mail for iphone"?

I would like to use a personalized thank you and signature, but I only get the "free advertising" for Yahoo!
Is there a way to disable it and insert my own signature on an iphone 4s?
Thanks
PS- If this is a dumb question, please excuse me, I'm 56 years old, this is my first smart-phone, and I've only had it for 2 days.
Thanks again.

2013-02-27T22:43:52Z

Jit,
Thanks for your response. Unfortunately, it didn't work.
Maybe it's because I'm not using the default "mail", but going directly to Yahoo Mail.
I've tried to use the default, but it won't accept my password. I haven't tried very hard.
BUT
I did discover a way that works for me-
I type my email, tap on the Iphone Signature, and delete it, letter by letter.
Then, hit send.
Now, no Iphone advertising is being sent.
Hopefully, when I figure out how to use the standard mail, it will be as easy as you say.

Jit2013-02-27T14:00:38Z

Favorite Answer

Hi Bruce A,

By default, when you send an email from your iPhone, a "Sent from my iPhone" signature will be added to your message.

You can edit this following these easy steps:

1.From your iPhone home screen go to the Settings menu;

2.Tap on the Mail button;

3.Select the Signature option;

4.Change the Signature to blank or whatever signature you would like to be added at the end of your e-mails.

Hope this helps! :)

bloomsberriette2014-09-29T11:32:25Z

There is no signature option in the settings for Yahoo Mail for iPhone that I've been able to find.... I've eliminated "sent from my iPhone" on my main Yahoo account, but that must be separate from the iPhone one...