If you see an item description on ebay and they tell you it comes with easy-to-follow instructions, you should probably try to find those instructions on the internet and see if you think they sound easy. I'm sure a lot of people love teeny tiny cables and stickers and screws, but I'm just not one of those people. I didn't get my keyboard changed out but decided I'd reached my level of comfort and gave up. Looks like I should have given up sooner, because I couldn't get a signal after putting it back together. And I actually had to try several times, because the touchscreen didn't work.
It's just funny to me that I wanted to keep my phone for a long time and that the steps I took to keep it useful for me backfired. Luckily I've been very good with my money lately so a trip to the T-Mobile store today won't be too painful.