Iphone 5s water damage

My screen is a little discolored, but I'm okay with that. I've soaked it in rice (this happened about 24 hours ago)
I had service, but now I only have no service but occasionally get service. (weird sentence, my bad)
The power button stopped working as well, but it started working again.
I have tmobile and have been with them for over 10+ years, I was wondering if they could replace it or what my options are?

How to know if I can spend money on a certain item?

I know my title sounds silly but please be patient with me. I'm saving money right now and I'm trying hard to work towards buying a house. Perhaps I can get some good advice from people who have managed that? I basically don't know where to draw the line, between buying something e.g. An iPhone 6 and keeping the money in the bank. If I'm saving money, but need a new and durable phone for instance, does saving mean I have to compromise on the quality of the phone I get just so that I can keep the money in the bank? The phone is just an example, what I really want to know is can people who are saving money still spend money on items they want?

How to update apps on iPhone with no Wi-Fi?

My Wi-Fi antenna in my phone is broken and I have roughly 30 apps that need updates. A few I can't use until I update. I don't want to burn through a ton of data updating apps. I didn't know if I can update my apps through iTunes on a different computer than I'm synced to due to the fact that my hard drive crashed
In my computer. Any help or advice is appreciated(other than telling me to get a new phone. If I could afford it I wouldn't be asking this question)

Iphone 5 camera problems will apple replace it?

Iphone 5 camera problems will apple replace it?

Added (1). There are small dots inside my camera that only show up in the pictures. When I first got my there was one small dot that did not bother me so much but now its 10 times worse and it messes up my pictures? What can I do?

Added (2). There are small dots inside my camera that only show up in the pictures. When I first got my there was one small dot that did not bother me so much but now its 10 times worse and it messes up my pictures? What can I do?

If I completely reset my Iphone 5s, will it go back to IOS 7?

I just got my new IPhone, and upgraded it, but there have ben several problems. Not only do I hate the layout, but it refuses to connect to my Wi-Fi, saying the password is incorrect every time I enter it correctly. Would resetting the phone completely turn it back to normal?