The underside of the Dell Latitude 15 5511 is easy to open after removing all visible screws. Afterwards, the storage drive, RAM, battery, and WLAN module can be accessed. Everything is prepared for the use of a WWAN module, including the antennas.
In our test configuration, 16 GB of RAM was also installed as a single module, so that the second slot is free for an expansion. In addition, there’s enough room for a 2.5-inch drive. A SATA port on the motherboard is also free for this, but a connection cable wasn’t included with our test device.