Searching for a Reliable IPTV Service

Hey everyone, I've recently gotten into the whole IPTV scene and I'm hoping to find a solid provider that ticks the following boxes:

1. Full HD / 4K channels with stable streaming
2. Good selection of live sports and movie channels
3. On-demand library (movies & series) that stays updated
4. Zero (or minimal) buffering during peak hours
   Price isn't really a dealbreaker for me — naturally I'd prefer something affordable, but what matters most is that it's reliable and runs smoothly on both my Firestick and iPhone.
   If anyone has personal recommendations or has been using something they're happy with, I'd really appreciate the help. Thanks in advance! 🙏