Ronaldo's phone has a black back and sides with a gray front. On the front, under the screen, there are three buttons.
Ronaldo uses his phone while working at Beach Citywalk Fries.
Ronaldo takes a picture of Steven's fingers, shape shifted into cats, with his phone.
Ronaldo takes a picture of the ocean's disappearance with his phone.
Ronaldo shows Steven his blog on his phone.
Ronaldo takes a picture of the Watermelon Stevens with his phone.
Ronaldo takes pictures of the Gem Warship with his phone.
Ronaldo uses it in flashbacks.
Ronaldo is seen posting on it after Jane dumped him, most likely expressing his misery on his blog.
Ronaldo can be seen presumably filming Mayor Dewey's first speech from the counter of Beach Citywalk Fries with it.
- It appears to be the same model as Steven's Phone.