How to know if my iPhone is jailbroken? - 1

I have the iPhone 3G one. It used to be my dads, and I was sure he jail-broke it because he would use it to "tether" and also he had a weird "slide to unlock" button (it was a Pokemon ball instead of the arrow). He gave it to me and everything on it is gone. No traces of pictures, apps, etc. It's like new. I heard one way to find out if it's jail-broken is to look for Cydia, but there are no apps on the iPhone. Did he somehow… Un-jail-break it? Lol.

IPhone 4 will not display home Wi-Fi?

My iPhone 4 has recently stopped displaying my home Wi-Fi network. I can use 3G just fine, but I have limited data. Everybody else in my family can use the Wi-Fi on their iPhones just fine, it's only mine that seems to be a problem. I've tried rebooting the phone, clearing my network settings, restoring the phone, manually entering the Wi-Fi info, etc. Does anybody know a definite way to solve this?

Added (1). The Wi-Fi is on, airplane mode is off, and everything is in working order, except for the fact that I can't find my home Wi-Fi connection and my Safari bookmarks are all gone.

I've cheatedon 4 of my exams so far?

But tomorrow I have one class where it will be hard to cheat. I have all the answers on my iPhone but I do not want to appear suspicious. What do I do

How will I know my iphone is unlocked?

I filled out a form online to have my iphone unlocked with vodafone and they said it should be ready in the next couple of days, all I need to know is can I just put my sim in and try turning it on or will I need to have a Wi-Fi connection to see if it has worked?

Buying wholesale and reselling? Need ideas

I'm currently trying to buy products in lots at wholesale prices in order to resell them locally. The plan is to have a simple Facebook group with various pictures of what I'm selling along with the prices, then the user can comment on the photo and arrange to meet.

I currently have bought phone cases (for iPhone 4 & 4S), belly button rings and bikinis. I need some high demand products (probably should be summer related since it'll be in need very soon) that don't come at a high price. I'm not exactly willing to risk thousands of dollars in case my items don't sell. Items that are below 20 dollars are pretty much what I'm aiming for.

Also, are there any good sites that sell stuff in bulk for low prices? I've been doing most of my spending on aliexpress.com, dhgate.com and ebay.ca. I'm not looking to buy 100 pieces of 1 item, but maybe between 10-20. Thanks! I actually ordered dresses off of wholesalefashionsquare.com but they cancelled my order for some reason and I haven't tried re-ordering.

Good items to buy and resell on craigslist?

I'm 13 years old i have 50$ and i plan on doing buying cracked Iphones and replacing the screen then selling them. What else can i do? I usually buy sick/under fed reptiles keep them for a month or two then resell them once they get are back to a healthy state, i need other items to do this with so i can make some $