: It is explicitly designed to stay functional in low-bandwidth scenarios, including outdated 2G environments or locations with spotty connectivity.
No. All your profile information, photos, friends, messages, and posts are safely stored on Facebook's cloud servers. Switching apps simply changes how you view that data; you will lose nothing. Why is my Facebook Lite app not installing? facebook+lite+download+9apps+install+updated
Step-by-Step Guide: Facebook Lite Download and Install via 9Apps : It is explicitly designed to stay functional