In recent years, the market for mobile devices has increased and technological developments haveadvanced in a rapid pace. More and more communication is done through mobile and handhelddevices. Therefore, even the seizures increase by these devices, because there is often very valuableforensic information stored on them. The purpose of this work is based on a method combining aqualitative and a quantitative study examining forensic tools and techniques for handheld devices.The paper analyzed forensics description of chip-off technology and its implementation, as well asCellebrites different extraction methods are tested to see what information that is possible to extractwith each method.To seek answers, literature studies, own investigations and semi-structured interviews have beenconducted. The report is divided into different sections, where the current operating systemsAndroid and iOS, Cellebrites tools and chip-off technique are described, own investigations made,the interviews carried out and the results thereof. The results show that the type of information thatis possible to obtain, differs depending on the extraction method. Chip-off technology allows a fullphysical extraction on handheld devices that can be locked and broken, but requires some training,experience and specialized equipment.