Why port forwarding on port 80?

I have a foscam home security camera and it needs port forwarding on port 80 if I want to use my iphone to view it from outside. Surely enough, it works as soon as I open that port. But isn't port 80 open by default? Else how could I view http websites in the first place. I don't get it. It's already open so why open it again?

Why do so many people have iPhones?

In my opinion, Androids are better. They have more features than iOS. I only see poor people having iPhones. Maybe it's because Apple is showing them everywhere and people are thinking the iPhone is good. But technically, it's not. I see many people have one and I started falling in love with my iPod Touch again as if it's an iPhone instead of my new Android tablet. I was tricked! Androids are dying! D

Iphone will not turn on! Shows Apple logo then fades out?

I have an iphone 3g used, jailbroken. Worked fine till last night, left it in car, woke up this morning and was off. I plug it into car charger and now apple logo went on, then fades out and nothing adter 30 seconds. I went to store and guy said to reboot in itunes. I plug it into my computer and NOTHING! Won't detect it or even give the apple screen. I plug it into my car charger, hold home and power button and I get the plug into itunes screen. As soon as i unplug it to connect to laptop itunes, the phone shuts off. Help! My business is on this phone. When it is plugged into i tunes, i just get a faint black screen. I only get apple logo when plugged into car charger.

Iphone 4s un-jailbreak

So i just jailbroke my phone (iphone 4s) and i had no idea about the warranty being disabled if you jailbreak your phone. I have my phone up till june 2014. I was wondering if i restore my iphone and wipe everything out if it will cancel out the jailbreaking and my warranty will still be intact?

IPhone not charging? What should I do?

After pluging in the ligthning cable… It didn't charge. I removed the cable and saw some wet pocket lint on the cable. There was some pocket lint still inside the charging slot so now I have removed it. The phone is off right now and I have cleaned out the lint.

Is it safe to plug it back in and try again?

IPhone 5 was not charging? What do I do?

I think my gloves fabric went into the charging slot and it must have been wet because of the snow outside. I didn't use the phone while using my gloves but somehow there's stuff in the charging slot. I noticed it wasn't chargin when I plugged my lightning cable into it and nothing was happening. I take out and look at the tip of the charging cord and it had some wet dark cotton on it (like my gloves).

I shutdown the phone and am now removing the stuff using a toothpick. What should I do I'm scared it will never charge. Will it work still when I remove the stuff? Should I wait till it dries, the cotton seems a bit wet but not really that much.

Is my phone charging already shorted?

Any tips on what I should do?