Is this a good or bad business idea?

I plan on buying some plain iPhone cases and decorating them with sharpies and stuff. They're about 8 bucks per case, I figure I could sell each case for 20-30 bucks.

Is this a good idea? Would you pay 20-30 bucks for a case?

Is there any way I can message on an iPhone without a SIM card?

Okay, long story short. So I'm going on a High School trip for three days soon, and I really want to be able to contact my family. We're allowed to take our iPhone's but we have to take out the SIM cards. Is there any way I can contact my family without one?

Would you buy a hand drawn iPhone case?

I'm thinking about starting a very small business. I plan to buy a few plain iPhone cases (they're around 8$ each) and make drawings/designs on them with sharpie. I figure I could sell a case like that for 20-25 bucks.

What do you think of this idea? Would you buy a hand drawn iPhone case? Is 20-25 dollars reasonable?

I wanna become a I T person?

I'm pretty smart with computers! And really smart with iphones, ipods and ipads i know how to do alot like jailebreak, unlock, update ios, and setup everything and fix it when anyones breaks! I'm 13 i know stuff like that and at school i know how to shutdown other peoples computers using command and i'm learing now how to boot peoples facebook and stuff so more advanced! What age and what's the next step to do if i wanna become an computer I T person?

How to backup my iPhone before updating the version?

How do I backup the files I have on my iPhone before I update my iOS version? I want to do it because I want to unjailbreak my iPhone. It's so stupid because you can't update you iOS version without unjailbreaking it. I decided to unjailbreak it and never jailbreak it again.

My Iphone 4 will not connect to my computer and itunes?

I have done it before. I have connected it to my computer, and put songs onto my phone through itunes. But now for some reason, it won't connect to my computer, and it won't open in itunes. This is really starting to tick me off. What can i do?

Added (1). I connected to my computer last time, and it connected fine and connected to itunes. Now with the same cable, it will just start charging when i connect in to my computer but it will not connect to itunes. I have tried different cables but that doesn't seem to work either. I don't know what's going on here.

Old number to new micro sim?

I just got a new iphone and for me it's a huge update since my old phone is a nokia3310. Last week I activate a new micro sim card (t-mobile), but I'd like to keep my old number (orange).
I don't know how to do it! I've look on the internet, but seriously is really confusing to me! I've tried to call the 150 both from my old and the new number, but I don't know what do…
Could someone help me please?
Thanks

Added (1). I don't wanna cut it! Plus i made a contract on the new number

Will iTunes reset if i update it to 11.0.5?

I just updated my iPhone and I can't connect to iTunes anymore. It says I have to update the version of the iTunes itself first. Is everything on my iTunes gonna be deleted if I update it to the latest? Really hoping for replies, thank you so much! Xx