"i have some pictures of you in/on my phone"
"i saved the address in/on my phone"
At the moment, neither of them is correct because the word "I" has not been capitalised and neither of them ends with a punctuation mark. Click on "Edit Post", make the relevant changes and then we can look at the content.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.