Taking out the back cover will be hard - there are a lot of moulded clips on the periphery, you must gently pry them open with a thin blade one at a time; Start at the bottom, next to the speaker and go all around except for the left side (the one with the card) there it will just lift out when you rotate the back cover. Be sure not to rip the antenna connections and do not force it or the back cover will split.
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Taking out the back cover will be hard - there are a lot of moulded clips on the periphery, you must gently pry them open with a thin blade one at a time; Start at the bottom, next to the speaker and go all around except for the left side (the one with the card) there it will just lift out when you rotate the back cover. Be sure not to rip the antenna connections and do not force it or the back cover will split.