Can I sell the new Iphone 4s I got on contract?

I'm thinking of getting a postpaid plan as it comes with an iphone 4s

Can I actually sell this Iphone the moment I receive it, will not open the box? I just want to sell it because of the high resale value and buy another phone

Problem connecting laptop to Wi-Fi after putting on password?

I just put up a password on my bsnl modem Wi-Fi and i have problem connecting my dell inspiron to it. All my other devives such as nexus 7 and iphone connect to it. I got wimdows 8 and it shows that -
The settings saved on this compute for the network do not match the requirements of the network.

Duplicate songs on my iphone?

All the songs in "music" in my phone are all duplicated. However, i don't have any songs that are duplicated on itunes on my computer. Please help.

i tried unsyncing all the songs and resyncing them but it's not working.

Added (1). i can't delete them on the computer because like i said, it only shows that it's duplicated on my phone. It's normal on the computer.

Should i buy canon 70d or iphone5s?

I don't want to ask my mom to buy these instead i saved my money so i can afford one. I have an iphone 4 and nikon 3100. What will be worth for an upgrade? I used them both regularly for photography. Any suggestions?

IPhone 4S Won't Connect to iTunes? - 1

I have an iPhone 4S running on iOS 7.1.1. Whenever I try to connect it to iTunes, nothing shows up on the computer. No devices show up anywhere so I can't even find it in the settings, but my phone does charge. I've tried this on three computers: one MacBook Pro, one iMac, and one Windows XP laptop. I don't know what's wrong… I can't even restore my phone physically, since my lock button is jammed, so there's no use restoring it. Is there something wrong with the USB cable, or it there something wrong with my phone?