Storage and content

Recently I have broken my phone and got it repaired and without backing up my photos or content I took my sim out and used another I phone for the time being. When I got my phone back from repair my contacts and photos were still there and everything was fine however I when I put my sim back into my phone the photos I took on the other iPhone I was using replaced my ones on my original phone how can I get the original photos back? Also my contacts are fine!