How to UNBLOCK iPhone from accessing Wi-Fi?

I think my phone's been blocked from accessing Wi-Fi. My brother does something in cmd.exe (on his computer) to prevent certain gadgets here in the house from accessing Wi-Fi. How can I unblock my phone on my own?

T-mobile iphone vs att iphone? Pick who?

How is tmobile iphone? Does anyone have tmobile iphone, does it same with att,

. How 3g/4g/lte on tmobile? Is it fast even att or slower or faster. How quality on iphone tmobile? Is it same att or smoother than att

Is it possible to have 2 phone numbers with one iphone 4s?

I'm opening a small business and want a separate phone number, but I want it to come to my iphone. Is this possible. I know I can always do call forwarding from another number but that's just too much hassle with having to get another phone and another plan or whatever.

Is it possible for me to get a 'special discount'?

So I'm already 14 and I visit lots of places and people. So I'm trying to get a phone, probably the iphone 5 or iphone 4s or any phone.really. And will be enlisted in At&t's phone users (No other phone company). But I really want to know if I get my first phone from At&t, will I get it for free (probably not) or will I get like a discount?

Deleted a direct message on twitter, can i get it back?

I've deleted a direct message conversation on twitter by accident! I was on twitter for iphone and slid across the wrong conversation deleting all of the messages to and from that user!

Is there any way to get them back?