Sony Xpreia acro S Working Instructions page 75

Reassembly
Push the SIM Connector into the bottom.
Use an air gun to clean the Cap SIM and its hole!
Do not touch the sealing rubber of the Cap SIM!
Make sure that the Cap SIM is clean and no dirt,
particles and fiber attached on it! Otherwise replace a
new one.
Press to snap the Cap SIM.
1267-1071 Rev 2
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Sony Mobile Communications AB – Company Internal
Working Instructions (mech)
75(76)