Software Issue

Hi Apple Community,

My iPhone 7 was working really well until about 3 weeks ago, when I started noticing a few issues. To make or receive calls, use Siri, and take photos (main camera - taking photos with snapchat still work), I now need to restart my device each time. After doing so, it will work for 30-60 minutes before the same issues resurface. I first used Apple's online support and did a factory reset/restore from backup, but that didn't solve the issue. We then ran a diagnostic test, and I was told there were no hardware issues either. It was suggested that I make a Genius Bar appointment, which I did. Once there, we did another factory reset and restore using a Macbook running Catalina, as well as used a backup that was saved from before the issues arose. I also did another factory reset without restoring any backup, but the same issues keep appearing.

Ultimately we weren't able to fix my phone and it was recommended that I trade it in for a new one. However, I really love my iPhone 7 and minus the issues above, it is in great working condition (all other functions including internet and messaging apps work seamlessly), the battery was recently replaced, and it has no cosmetic defects on any kind. Before I give up, I wanted to canvas the community and find out whether there are any other options I have to save this phone. Is there any chance that waiting for the next software update would have an affect? Any other options?

Thanks!