Increase Wi-Fi signal on Iphone 4?

I'm on Virginmedia

my wi-fi signal gets lost when i go upstairs even thoough my modem is downstairs how do i increase my Wi-Fi signal

i've tried turning my modem off and then on.

Howmuch is my iphone 3g 16gb worth if in this condition?

The condition is excellent just dropped a few times ( about 6-7 ) or maybe more there's a crack near the lock so if i change cover of iphone 3g which cost like a dollar, the iphone is working like a charm and it is factory unlocked what do you think i should sell this iPhone for

IPhone 4S or HTC Windows Phone 8S?

I have the iPhone 4S in white, I like the phone of course but this Windows Phone 8S comes in different colours such as blue, is cheaper and looks pretty much the same. What is this phone like? Wonder if I should sell iPhone for this phone and still have cash to spare? Advice and help please?

What happens if you replace the logic board in an iphone 4s?

I have a Verizon iphone 4s. The logic board is in perfect condition and so is the SIM card, but it is the outer components that are requiring me to get a new phone. I want to just replace the logic board and SIM card from the new phone with my old ones. Is this possible?
And once I receive the new phone, can I just install my original logic board and SIM card or should I try to activate the phone first?

IPhone 5S Facebook message notifications?

I just got my first iPhone which is a 5s, and I was messing with my notifications to stop comments from showing on the lock screen, but now I don't get notified if I get a message unless I'm using the Facebook app, as far as I know my settings should make it so I get message notifications but it's just not working. Any ideas?

How to voice text on Iphone?

Is there a way to text through voice while I'm playing basketball or something. Like is there something that will speak the text I receive then I can say reply and then speak my text without having to touch my Iphone? Idc if its a jailbroken app or not I just need a way to do this cause I really hate when people text me while I'm shooting hoops.

Added (1). I use an Iphone 3gs and I need to be able to send and receive texts without ever touching my iphone.

Will there ever be a cheap Iphone?

I know the Iphone 5c is £400 but thats still not cheap! In america its $350! Thats £217.80! So why is it an extra £200 in the UK? £217.80 is a reasonable price for a phone in my opinion as I'm only 14 and I do not get a large sum of money every month.

Added (1). And the 4s is still £300 new in the UK aswell