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More convenient,easier to out,thats SIM plicity, the specialty of it is the groove on the SIM card. Buckle the groove, then it out. It solves the problem that its hard to get SIM card out of the cellphone.
Hubei University of Technology
Wuhan, China
Hubei University of Technology
Wuhan, China
SHI Qi
ZHOU Qingqing
CHEN Zhuo