Attachment card for subscriber identity module card and method for manufacturing the same

An attachment card for a subscriber identity module (SIM) card having a plurality of contacts for electrical connection comprising a flexible printed circuit board and a chip;

• wherein
• one surface of the flexible printed circuit board is disposed with a plurality of bumps for electrical connection;
• the bumps are arranged according to an established specification the contacts of the SIM card being disposed so as to electrically connect to the contacts of the SIM card in a one to one correspondence manner;
• a central area is formed among the bumps and lower than the bumps;
• the chip with preset functions is electorally connected to and fixed on the surface of the flexible printed circuit board with the bumps by surface mount technology (SMT), located at the central area among the bumps arranged according to the established specification;
• wherein the attachment card is attached to the SIM card while in use and the bumps of the flexible printed circuit board are electrically connected to the contacts of the SIM card in the one to one correspondence manner;
• this the preset functions of the attachment card are provided by the SIM card.