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So what exactly is the value of my trade-in???

I have an old 4 and 4S, but I am pretty sure I can get more for them off ebay or something.

It's for people that are either don't know how to sell it on the secondary market (you'd be surprised that it's more people than you think) or they can't be bothered to do it.
 
You have 5gb until you're throttled. Use it well.

Incorrect. You are ONLY throttled when and if their network gets busy on the cell tower area you are in once you exceed your 'soft cap'.

I was able to pull 8GB and still get 40Mb down off-peak hours. I tested this by streaming HD video through my Apple TV several times to consume the 5GB soft cap quick. Then ran several speed tests after to confirm the speed.
 
Incorrect. You are ONLY throttled when and if their network gets busy on the cell tower area you are in once you exceed your 'soft cap'.

I was able to pull 8GB and still get 40Mb down off-peak hours. I tested this by streaming HD video through my Apple TV several times to consume the 5GB soft cap quick. Then ran several speed tests after to confirm the speed.

Great to know! Does the same apply to the 500mb limit?

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If I purchase the T-Mobile iPhone at full price, does it come unlocked?

Yes it does and it includes AWS
 
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