Wi-Fi Significantly slower than my ethernet?

Recently, my internet was encountering some problems.
The charter dude came over, took my modem(which gave off Wi-Fi) and replaced
it with another modem, which does not give out Wi-Fi, and it only has one ethernet port.(what a dick)
So I hooked up my own router.(Linksys wireless B 2. GHZ 802.11b)
I'm not sure if it is good, a friend gave it to me
So I connected the modem to that directly, then connected my computer to the router.
I speedtested my computer via ethernet, and it gets 25mb down, (I pay for 30, but whatevs)
THEN, I speedtested it using my iphone, and from five feet away, at three bars, my phone is picking up only about 3 megs down. And 3 megs up.(equal up and down speed, weird?)

Before you say that Wi-Fi is slower, I used to get at least 20 megs down on my iphone(speedtest)

Is it the router? Is there something I need to set up? The modem is new, which router do you recommend?
why is that charter guy such a douche?

How to save the music on my iphone?

I'm using a new itunes so I need to sync my iphone with it and if I do I will loose some of my songs because I didn't purchase them all so Is there anyway I can copy the songs some where else?
P.S
Don't answer if your a goodie 2 shoes who's against downloading for free

Do you get a good signal with virgin mobile?

I'm just curious I was thinking about getting a spare phone but as a pre-paid plan instead and virgin mobile was the only one that had an iphone available, main reason I want an iphone is because I use Pinger a lot, I've looked at some answers for if its a good carrier for reception but the question was old so I'm not sure if it has gotten better or worse over the years.

Compare it to other brands out there if you can.

Record from piano onto iphone 3gs?

I want to record the sound coming out of my digital piano. The only output it has is a headphone jack. Is there a way to plug this into my iphone 3gs and use the voice recorder? If not, how can I record with decent quality? I would rather not plug into the "line in" jack on my PC as it is upstairs and the piano is downstairs.

Where can I find durable his and hers cases for the iPhone 4 and 4s?

I really wanna get matchin his and era cases for my boyfriend and me but he works in the tree business so his phone needs to be super protected so he doesn't want to use anything beside an otter box but the only his and hers otter boxes are the camo ones. Does anyone know of any other really durable cases anywhere?