There are other threads where it's been discussed, and if you look online you'll find lots of videos that deal with the difficulty and issues afterwards.
Mainly:
- the glass is glued to the digitizer, and it's difficult to get the glass off without damaging the touch screen. It requires heating the glass to separate it from the digitizer, and if you're not very careful you can mess up the touch screen in the process.
- gluing the new glass on the digitizer presents its own difficulties, getting the bubbles out and again not damaging the digitizer in the process
- you really can't test everything until it's all back together, and more often than not there seems to be a loss in touch sensitivity or touch accuracy after this process
$165 for a replacement screen assembly is alot cheaper than $500 for a new phone, although I'd guess you could find a used phone on eBay for less than $165 and just snag the screen assembly and sell the rest for parts.
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