| SMARTONE 3G LIMITED | Private company limited by shares | Live |
| SMARTONE COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| SMART-ONE ELECTRONICS (HK) LIMITED | | Live |
| SMARTONE CHARITABLE FUND LIMITED | Company limited by guarantee | Live |
| SMARTONE (HK) LIMITED | Private company limited by shares | Dissolved |
| SMARTONE (HK) CO. LIMITED | Private company limited by shares | Live |
| SMARTONE INDUSTRIAL (HK) LIMITED | Private company limited by shares | Live |
| SMARTONE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SMARTONE INVESTMENT MANAGEMENT CO., LIMITED | Private company limited by shares | Dissolved |
| SMARTONE PUBLISHING LIMITED | Private company limited by shares | Live |
| SMARTONE TELECOMMUNICATIONS LIMITED | Private company limited by shares | Live |
| SMARTONE TRADING LIMITED | Private company limited by shares | Live |
| SMARTONER TECHNOLOGY HONG KONG LIMITED | Private company limited by shares | Dissolved |
| SMARTONER INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |