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iFixit hails replaceable LPCAMM2 laptop memory as a 'big deal'
(www.theregister.com)
This is a most excellent place for technology news and articles.
So I guess it was UV epoxied after soldering and he put new epoxy on with the new nand. Or something along those lines but the component is soldered in a typical way. The rotary tool being used to pull out the residual phone glue is excellent and I feel like I learned something useful even though I'm never going to do an iPhone ram upgrade.