Can I put a passcode on a Nokia N97 mini?

I want to put a passcode like you can have on apple devices on my phone. I'm using my Nokia N97 because I had my iPhone stolen at school and I don't have enoght money to get a new one yet so I was wondering how I put a pass code on it like I can have on my iPhone please help thanks

Is buying a iPhone with Bad ESN bad?

I want to buy an iPhone 4 or 4s but it says bad esn. I'm not going to activate the phone to any provider. I just want it for Wi-Fi for home use. Is it bad to buy it or okay?

Computer downloading massive amounts of unwanted data?

Whenever I connect to the internet from my laptop (Acer Aspire 5100 running Windows Vista Home Premium) it starts to download a large amount of data from the internet. I have not asked it do so but it does it anyway and I have no idea what it downloads. My prepaid internet connection has a data limit of 1GB valid for a month and I try to keep it that way but unfortunately it finishes in about a week. I heard the new iPhone has a similar problem. I did not notice this before because I was using an unlimited data connection but that got too expensive so I switched to the current prepaid one and that's when the problem started. I use the connection mostly to check my email, Facebook and Wikipedia and I seriously do not think that that takes up 1 Gig within a few days. So can someone please tell me how to prevent my computer from downloading all that unwanted data? I hope the problem can be solved without moving on to a new laptop because I really can't afford a new one.

Imessage suddenly changed to Text message?

I have an Iphone 4 and my friend has an Iphone also, but I don't know the brand. I was sending him a message and right in the middle of sending, the "Delivered" icon that would usually appear didn't show up so I thought it was a delay. I turned my phone on and off thinking it would be fixed but found that his imessage had switched off and my text had been sent as a Text instead. All my other contacts who have Iphones still allow imessage, except for my friend's phone that spontaneously changed to Text Message mode. Is there something wrong with my Iphone or is something wrong with his?

Does your iPhone have to be on to track it?

I recently lost my phone at a football game, I tried to call it and it goes strait to voicemail. I've also tried the app called "find my iPhone" but it says my phone is offline and could not find it's location.

Does my phone have to be on to be able to track it?

Unlock verizon iphone 4 to use on virgin mobile?

My dad is switching our phone sevice from verizon to virgin mobile. The virgin mobile iphones are $600 and i'm def not willing to pay that much unless i absolutely have to. My friend is selling her verizon iphone 4 32gb and I wanted to buy it from her. But, only if there's a way for me to unlock it and use virgin mobile service on it. Can i do this? How do i unlock an iphone? Any links, youtube vids, or info would be great.couldnt find anything that answered my question online.

Added (1). Also, will i have to jailbreak the iphone to unlock it? Don't want too have to deal w the problems that come along with jailbreaking the phone.

Why is my iPhone 4 using so much data?

When I first go my iPhone a few months ago, it didn't use much data at all, and I was on it very often. In the past few weeks, it has started using data like crazy. This morning, I reset the data usage in settings (which is how I keep track of it), and I checked it just a few minutes ago. It said I had used 11.9 GB today. I only have a 1 GB plan a month, so you can see how that would be a major issue. I spend 75% of my day in areas where I'm connected to Wi-Fi. My push-notifications have always been disabled. I do not use apps such as Pandora and Spotify to stream music. How could it use that much data in one day?