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Install the cards correctly, then ensure there are no debris, such as sand or dust
to avoid damaging the rubber seal. Press the seal cover tightly.
Finally fix the back cover and lock. Do not tighten too strong the screws to avoid
damaging.
Notes:
1. Your phone only supports Micro-SIM cards. Do not attempt to insert other
SIM card, otherwise it may cause phone damage.
2. Please do not remove the SIM/SD card while the card is in use; otherwise,
data loss or damage may occur. Crosscall shall not be liable to any loss,
including data loss, due to the misuse of an SIM/SD card.
3. Please turn off your mobile phone before replacing or removing its SIM/SD
card.
4. SD card is not supplied, so you need to buy it by yourself.