We run the biggest dedicated customer service fleet in Hong Kong, providing world-class and round-the-clock support, locally and internationally. Just call our hotline whenever you experience problems using your mobile phone overseas.
Dialing from mobile:
| 1O1O Product Hotline: | + 852 2988 1010 ▲ |
| 1O1O Customer Service Hotline: | + 852 2888 1010 ▲ |
| 24-Hour Overseas Emergency Hotline: | + 852 3477 4088 ▲ |
| ▲ | Roaming charge waived when a 1O1O mobile number calls any of the hotlines above. |
Dialing from fixed line:
| Roaming Destinations | Dialing Method |
| Australia | [0011] 800 2888 1010 |
| Austria | [00] 800 2888 1010 |
| Belgium | [00] 800 2888 1010 |
| Brazil | [0021] 800 2888 1010 |
| Canada | [011] 800 2888 1010 |
| China | [00] 400 120 1010 [00] 800 2888 1010 |
| Denmark | [00] 800 2888 1010 |
| Finland | [990] 800 2888 1010 |
| France | [00] 800 2888 1010 |
| Germany | [00] 800 2888 1010 |
| Hawaii | [011] 800 2888 1010 |
| Ireland | [00] 800 2888 1010 |
| Israel | [014] 800 2888 1010 |
| Japan | [00] 800 2888 1010 |
| Macau | [00] 800 2888 1010 |
| Malaysia | [00] 800 2888 1010 |
| New Zealand | [00] 800 2888 1010 |
| Norway | [00] 800 2888 1010 |
| Philippines | [00] 800 2888 1010 |
| Portugal | [00] 800 2888 1010 |
| South Korea | [001] or [002] 800 2888 1010 |
| Singapore | [001] 800 2888 1010 |
| Spain | [00] 800 2888 1010 |
| Sweden | [00] 800 2888 1010 |
| Switzerland | [00] 800 2888 1010 |
| Taiwan | [00] 800 2888 1010 |
| Thailand | [001] 800 2888 1010 |
| UK | [00] 800 2888 1010 |
| USA | [011] 800 2888 1010 |
| The above international IDD prefixes are required if dialing from a land line. Notes:
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