They won't let you take in your phone, so do not expect to be able to show photos on it. You can take in a folder with more evidence, though, so you can take printed photos. If the visa officer asks to see more photos, you could say you have lots on your phone, which is at the reception. Maybe the visa officer would then get them to bring it in.
At the embassy where my husband was interviewed, we had to hand over our phones and any other electronic devices to the guards. We were able to take in printed evidence.