Methods and systems of using SIM cards inserted at another device

#The present invention relates in general to the field of mobile network apparatus. More particularly, the present invention relates to circuitries to carry SIM card data over a distance, especially using RS-485 standard and using a CAT-5 cable.

#When a wireless communication apparatus is not able to receive good reception from a cellular network, it is common to move antenna position or move the wireless communication apparatus to a location where good reception is available. However, in many situations, it is not feasible to move the wireless communication apparatus. Therefore, some wireless communication apparatuses are capable of coupling to external antennas and the external antennas may be then moved to positions with good reception.

#Antenna cable could be expensive and subject to signal loss. In addition, different antenna cable may be needed for different frequency bands. This also increases operational cost and capital cost. A solution is needed to allow the wireless communication apparatus to have good reception with a cellular network without moving the wireless communication apparatus or without using a long piece of antenna cable.

#The ensuing description provides preferred exemplary embodiment(s) only, and is not intended to limit the scope, applicability or configuration of the invention. Rather, the ensuing description of the preferred exemplary embodiment(s) will provide those skilled in the art with an enabling description for implementing a preferred exemplary embodiment of the invention. It being understood that various changes may be made in the function and arrangement of elements without departing from the spirit and scope of the invention as set in the appended claims.

#Specific details are given in the following description to provide a thorough understanding of the embodiments. However, it will be understood by one of ordinary skill in the art that the embodiments may be practiced without these specific details. For example, circuits may be shown in block diagrams in order not to obscure the embodiments in unnecessary detail. In other instances, well-known circuits, processes, algorithms structures, and techniques may be shown without unnecessary detail in order to avoid obscuring the embodiments.

#Embodiments, or portions thereof, may be embodied in program instructions operable upon a processing unit for performing functions and operations as described herein. The program instructions making up the various embodiments may be stored in a storage medium.