Huawei Ascend Y540 Guide De Démarrage Rapide page 4

Preparing your phone
To insert the SIM card, the battery and a microSD card please
perform the few steps shown in the following figures.
Your phone is shipped with the battery partially charged. It is
recommended that you fully charge the battery before using it
for the first time.
When fastening the battery cover, fasten its upper part
first and then press down the lower part until completely
fastened.
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