Is 100mb a month enough for an iPhone 4s?

I don't have an iPhone right now, but I see a good plan for $43/month for a 4s with Unlimited texting, pic & video messages, and 100mb a month. My house, my school, and most of the places I'd be "browsing" (like buses, malls and fast-food places) have Wi-fi, so I'd be able to use it. I'd mostly be using twitter, and occasionally checking a couple other websites. Would 100mb be enough?

Right now, I have a really old Blackberry (from 2009) that costs $65 a month. It has unlimited internet and other features since it doesn't have a Wi-fi option

Added (1). I never travel anywhere either, so that won't be a problem, lol.

How much will the monthly service cost for the new iPhone 5 cost?

My parents are planning on getting me the new iPhone 5 for my birthday late this September. However they are concerned about the monthly data plan price.

1. What is the expected monthly data service cost?

2. Will users have the option to choose 4g or this new LTE plan?

Added (1). Not the cost of the actually iPhone 5, just the monthly service plan

Added (2). I currently have a 3g data plan for my android, will the plan price go up with iPhone 5 and LTE?

How to update jailbroken ios 5 iphone to ios 6?

Got a jailbroken iphone 4 with absinthe to ios 5.1.
My question is, is it possible to update to ios 6 when it comes out without deleting anything on my iphone, like valuable gba emulator saves (on youknowwhat game: P), and cydia tweaks.

If i just updated on itunes, i'm assuming, it would un-jailbreak everything right?

Does the 5th gen ipod touch come out the same day as the iphone 5?

The release date for the iphone 5 has been confirmed for september 21st and preorder on the 14th. The ipod touch 5th gen was also scheduled for preorder the 14th, but i haven't found anything that specifically says the ipod touch will have the same release day. Does it? (source greatly appreciated, thanks)

How much would it cost to switch from At&T to T-Mobile?

I have the iPhone 3s.(i got it unlocked and jailbroken, thays how i use it with tmobile) I want the iPhone 5 which is coming out this saturday! Sadly i can't get it unlocked like like iPhone 3&4 because the new iPhone 5 will have a nano sim card and obviously i have a regular tmobile sim card. I want to switch to At&T. I'm not out of my contract either. How much will it cost to switch! I want this phone so desperately you don't understand!

Can i activate a sprint iphone 4s with virgin mobile?

Everybody is getting an ipone 5 now.somebody i know said they would give me there iphone 4s once they got the 5. The 4s on vm is really expenisve. 600 dollars. Do you think i could get the same plan with a used/another company iphone (btw i think sprint bought vm) or are there extra charges