Sony Xperia C3 Dual Working Instructions page 9

Disassembly
Note the position of hooks!
Do the same for this hook.
Note! The hooks near Back Cover Assy corners are
tighter, the unsnapping action may repeat some times.
Do the same for this hook.
Do the same for this hook.
Be careful! Do not deform the Back Cover Assy near the
Audio Jack hole.
1290-1182 Rev 4
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Sony Mobile Communications AB – Company Internal
Working Instructions (mech)
9(72)