Samsung Galaxy J1 User Manual page 16

Install a Memory Card
You can install an optional microSD or microSDHC memory card
(not included) to expand available memory space.
Note: A memory card can be installed at any time; it is not necessary
to install it prior to using the device.
For more information on installing a memory card, see
"Install a Memory Card" on page 156.
Install the Battery
1. Insert the battery into the opening on the back of the phone
(1), making sure the connectors align.
2. Gently press down to secure the battery (2).
Getting Started Assemble Your Device
7