Need a new cell phone provider

I have been with Sprint for 10+ years total and enjoy the unlimited everything without having to worry, however lately the service has gotten worse. I have bad signal, terrible data, and no 4g like they promised for the last couple years. They used to also have great customer service, but now it sucks. Every time I go and have a problem it just cost more money and anytime I call customer service I get lied too and even call them out on it. Unfortunately I am still stuck in contract and can't do anything but waste money each month. My phone is less than 6 months old and defective and they won't even replace it for free (even under warranty) all replacements cost another $35. After spending a crap ton on the "latest and greatest" phone they still don't back up their products and service.

This is just my experience, like I said I used them for 10 years with no issues but lately I would not stay with them if it wasn't for the contract. Hope this information is useful to you.