I did two of these. The first was a WIFI model that the earphone plug had become intermittant (just needed to resolder the connections.) The second an LTE version that the battery had gone bad and swelled to about 3 times the size.
The swollen battery had pushed the glass free of the upper mount, and made the entire thing extremely tight.
The WIFI one came apart easily like described.
The LTE one (with the swollen battery) required a lot more care and a lot more force/damage to get into the gap between the two plastic pieces. (I did the wifi one first, so I could easily tell the difference.
So depending on your situation...it may not be easy to separate the pieces...but remmber, the thin glass is sitting on one piece of plastic, the gap is between that piece of plastic and the back panel...a darker shiny black plastic is the top piece, a slightly lighter duller black plastic is the back panel...of course the glass is ALSO black...so good luck.
The WIFI only one is exactly as pictured. The LTE one has 3 more screws, two are the motherboard mounting screws (one with tamper sticker) and one at bottom on the other mainboard (also with tamper sticker). Other than that it is exactly the same.