If you can't find needed information, you can use the ways in Contact us to reach us. Our customer service staff is online to provide service. Head office 8F-1, No. 285, Sec. 2, Kuang-Fu Rd., Hsinchu City 300, Taiwan (R.O.C.) Tel:  +886-3-573-4799  Fax:+886-3-573-4299 Email : angelica@tcelltc.com.tw Taipei Office Room 3E30, No. 5, Sec 5, Xinyi Rd., Taipei City 11011, Taiwan (R.O.C.) Tel: +886-2-2729-3371  Fax: +886-2-2729-5373 Email: jessie@tcelltc.com.tw