An unlocking method for a handheld electrical device with a normal mode and a limited mode, wherein the handheld electrical device in the normal mode is able to display all contents of an application installed on the handheld electrical device, and the handheld electrical device in the limited mode is able to display only part of the contents of the application, the unlocking method comprises: displaying a notice that corresponds to unlocking with a second preset data corresponding to the limited mode on a display unit of the handheld electrical device under a locked status; obtaining at least one unlocking input without a user account from an input unit of the handheld electrical device when the handheld electrical device is under a locked status while the notice that corresponds to unlocking with the second preset data corresponding to the limited mode is displayed on the display unit of the handheld electrical device; comparing the unlocking input with first preset data and second preset data to generate a comparison result, wherein the first preset data and the second preset data is stored in the handheld electrical device; and releasing the locked status of the handheld electrical device according to the comparison result, wherein releasing the locked status of the handheld electrical device according to the comparison result comprises: releasing the locked status of the handheld electrical device and making the handheld electrical device enter the normal mode when the unlocking input matches the first preset data; and releasing the locked status of the handheld electrical device and making the handheld electrical device enter the limited mode when the unlocking input matches the second preset data displaying a notice that corresponds to unlocking with a second preset data corresponding to the limited mode on a display unit of the handheld electrical device under a locked status; obtaining at least one unlocking input without a user account from an input unit of the handheld electrical device when the handheld electrical device is under a locked status while the notice that corresponds to unlocking with the second preset data corresponding to the limited mode is displayed on the display unit of the handheld electrical device; comparing the unlocking input with first preset data and second preset data to generate a comparison result, wherein the first preset data and the second preset data is stored in the handheld electrical device; and releasing the locked status of the handheld electrical device according to the comparison result, wherein releasing the locked status of the handheld electrical device according to the comparison result comprises: releasing the locked status of the handheld electrical device and making the handheld electrical device enter the normal mode when the unlocking input matches the first preset data; and releasing the locked status of the handheld electrical device and making the handheld electrical device enter the limited mode when the unlocking input matches the second preset data releasing the locked status of the handheld electrical device and making the handheld electrical device enter the normal mode when the unlocking input matches the first preset data; and releasing the locked status of the handheld electrical device and making the handheld electrical device enter the limited mode when the unlocking input matches the second preset data