I add an image to the text ( not even sending ) lumia 928 and the image is micro sized when i receive it on my lumia 925 it's blurred becayse th eimage is not stretched to it's miz and not even clear ...any ideas ?
Do you mean if you send it by email?
If so, pictures are indeed compressed.
If you want to send it uncompressed (original size). You can use below app http://www.windowsphone.com/s?appid=d2b228ba-39b1-4cb7-8e12-f9bf48e61281.
And mark the box "zip" then the full size picture will be sent.