Can locked iphone 4 be used for Wi-Fi internet?

Can locked iphone 4 be used for Wi-Fi internet? - 1

Added (1). If i buy a factory locked, icloud lock, carrier locked iphone 4 on very low price. Will Wi-Fi internet work just fine? I'm android user, i only need ios for testing websites on ios browsers as i'm web developer.

Can I cancel service with T-Mobile even though I still owe on an EIP device?

Last year I switched from AT&T to T-Mobile to try and save a little money and get a new phone. Big mistake… I barely have service anywhere and i'm constantly dropping calls when I do have service. I have unlimited data, but that's just about the only good thing. I wanted to switch to Verizon a couple of months ago so I went into pay the remaining $300 I owed on my iPhone 5S and cancel my plan (they don't have contracts). I was talked into upgrading to an iPhone 6 and was told that because my 5S was so new, that I would owe just about the same amount on the 6 and would be able to pay it off then and save a little bit of money rather than going straight to Verizon. Well, they lied. I now owe $500 something on an iPhone 6. I was completely irate. I went over everything in detail with the salesman before I signed any paperwork.

Now i'm stuck with a phone that I still owe $500 on and have TERRIBLE service everywhere I go. Is it possible to cancel my plan with T-Mobile and just pay the EIP payment for the phone I have with them so that I can go ahead and get a contract with Verizon, or do I have to have the phone in use in order to make the payments? What are my options here? I know I can't just give them the phone back for an EIP credit, although that would be convenient. I honestly don't care if I'm at a little bit of a loss here because I'm so sick of not having service anywhere.

How virus comes in my iphone?

When I'm using my iphone ( not jail break) I got a popup saying your iphone contain 13 virus click ok to remove. When I click ok a website open with a red bar and written remove now I click remove now button google play store open ( asking this question third time please give a useful answer ) not only on one Browser on all (exept safari) not one website How virus comes in my iphone - 1

Laptop gets slow internet connection, yet all my other devices get it at full speed?

This never used to be an issue up until a few weeks ago, we had a 60MB connection that was buffed up to 100, my laptop used to download at around 5.5 - 6MB per second, whereas now its between 2 and 2.5, yet my iphone and all other computers in the house still get the full speed. I have checked the drivers which are all up to date, I can't discover the problem, what could be causing this? And how can I go about solving it?

How to switch T-Mobile phone service from android to an iPhone?

I've been trying to get a new phone. I've always used an Android and now was thinking about trying an iPhone. Usually with Androids all I have to do is take my current SIM card out of my old phone and put it in the new phone and the service is there and I could use the phone immediately as long as it's with T-Mobile. Would it be the same way for an iPhone? Or would i have to do something extra to be able to get service on the phone. The iPhone is T-Mobile as well.