A portable electronic device includes a main section with electronic circuitry. A detachable flipping section is foldably mounted around an axis of rotation relative to said main section such that the flipping section can be folded in a first position. The flipping section is detachable and reattachable. A locking mechanism is provided with a resilient member, the resilient member being configured such that it orients, by action of the resilience of said member, the flipping section in a second position, the locking mechanism being further configured to prevent the flipping section from being detached from the main section within a position range comprising the second position.