What is the best CDMA network for an iPhone 4?

I have an iPhone 4 for the Sprint network. I was going to flash it to another network but I don't know which network to and why?

Verizon has very good signal but may be a little more expensive.depends on where you live and if you need a good signal.

Verizon has better coverage but you'll never get a Sprint phone on their network. They won't add any phone which doesn't have its ESN on their network already.

  • Wi-Fi on iPhone keeps saying unable to join network (my network name)? How can I fix this! It's been like this for a week but it works on my laptop fine. I tried unplugging it for a few seconds, I tried resetting network settings, I tried turning my phone off then on again, and I know I'm typing it right. I even typed it in upper case AND lower case. Does anyone know how I can fix this?
  • Which network works the best with the iPhone 5? I'm currently with T-Mobile, but switching to a new network soon. Which of these networks works the best with the iPhone 5: AT&T, Sprint, or Verizon? And what makes it better than the others?
  • What's the difference between off-network and on-network? I'm try to work out which is best for what I want out of the service. I want protection while on my iPhone 5 (both when connected via Wi-Fi and when roaming on 3/4G). Website with product details: http://www.umbrella.com/products/umbrella-security-features/
  • What is the best UK network for iPhone 5? I plan on using it for mostly texting, alot of internet browsing (Unlimited data preferred) and buying apps. Don't really use it much for calls. From what I've been told, O2 is usually regarded as the most reliable and best. I've had Orange in the past but I didn't like them at all. I don't really care for 4g much, because I think 3g is already quite fast enough.