F-tone's Factory in Chengdu, China：
- 5x24 Phone：86-13980052130
- WhatsApp ID: 852 94 176601
- Site: http://www.qsfposfp.com
- Email: una@f-tone.com
- support: support@f-tone.com
- Facebook: william@f-tone.com
- Skype ID: william@f-tone.com
- Wechat ID: F-tone
- ADD: F-tone Building, Tianfu Hi-Tech Park , Chengdu, Sichuan, China
Vietnam fully automated factory：
- 5x24 Phone：86-13980052130
- WhatsApp ID: 852 94 176601
- Site: http://www.qsfposfp.com
- Email: una@f-tone.com
- support: support@f-tone.com
- Facebook: william@f-tone.com
- Skype ID: william@f-tone.com
- Wechat ID: F-tone
- Add：Becamex Binh Phuoc Industrial Zone, Vietnam
Jiangyou Branch factory：
- 5x24 Phone：86-13980052130
- WhatsApp ID: 852 94 176601
- Site: http://www.qsfposfp.com
- Email: una@f-tone.com
- support: support@f-tone.com
- Facebook: william@f-tone.com
- Skype ID: william@f-tone.com
- Wechat ID: F-tone
- Add：No. 23, Kechuang Road, High-tech Zone, Jiangyou City, Sichuan, China
F-tone Networks Auto design：
- 5x24 Phone：86-13980052130
- WhatsApp ID: 852 94 176601
- Site: http://www.qsfposfp.com
- Email: una@f-tone.com
- support: support@f-tone.com
- Facebook: william@f-tone.com
- Skype ID: william@f-tone.com
- Wechat ID: F-tone
F-tone Networks Linux OS | WUJIOS：
- 5x24 Phone：86-13980052130
- WhatsApp ID: 852 94 176601
- Site: http://www.qsfposfp.com
- Email: una@f-tone.com
- support: support@f-tone.com
- Facebook: william@f-tone.com
- Skype ID: william@f-tone.com
- Wechat ID: F-tone
F-tone FPGA+ARM+DSP Broad：
- 5x24 Phone：86-13980052130
- WhatsApp ID: 852 94 176601
- Site: http://www.qsfposfp.com
- Email: una@f-tone.com
- support: support@f-tone.com
- Facebook: william@f-tone.com
- Skype ID: william@f-tone.com
- Wechat ID: F-tone