An electronic device may be provided with an ejector mechanism for at least partially ejecting a removable module (e.g., a SIM card tray) from the device. The ejector mechanism may include a user interface portion and a tray interface portion, and each interface portion may include a first end fixed to the device and a second end coupled to the second end of the other interface portion. Tension between the fixed first ends may bias the ejector mechanism to alternate between two ejector mechanism states when the ejector mechanism receives either a user input force to eject the removable module from the connector or a tray input force to insert the removable module into the connector.