VOLTE roaming service
VoLTE Roaming Service
 
Shorten the connection time for roaming voice with better quality
VoLTE Roaming Service
 
Shorten the connection time for roaming voice with better quality
VoLTE Roaming Service allow customer connects voice calls through overseas partner’s 4G LTE network while roaming. We will extend our VoLTE Roaming Service coverage and let you start experience the speedy VoLTE call connection, try to provide the best roaming service and support you every step around the world.
 
How to dial
No matter you are connecting with VoLTE Roaming Service or traditional roaming voice call, please use the following dialing method:
Dial + + country code + area code + phone number
Example: When you want to call back HK while roaming, simple input “+852 phone number
 
FAQ Q1. How do I use VoLTE Roaming Service?
A1. To enjoy VoLTE Roaming Service, you must:
  • Subscribe to our Data Service Plan
  • Enable IDD and Data Roaming Day Pass service
  • Use compatible device, updated to corresponding latest designated software version
  • Connect to partner’s network which has enable VoLTE Roaming Service
Q2. How much does VoLTE Roaming Service cost?
A2. There is no additional charge for VoLTE Roaming Service, which is the same as current standard roaming voice call.

Q3. How does VoLTE Roaming Service call be calculated and will it affect my roaming data usage?
A3. VoLTE Roaming Service call will not be counted as your roaming data usage. All VoLTE Roaming Service calls will be calculated in minute and rounded up to the nearest minutes.

Q4. If I turn off data roaming in my handset, can I still make VoLTE Roaming Service call?
A4. Yes, once you ensure the VoLTE option is turn on (if applicable), you can make VoLTE Roaming Service call with data roaming turn off in your handset menu.
  • Remarks
    1. VoLTE roaming service allow SUN Mobile customer connects voice calls through overseas partner’s 4G LTE network while roaming (“VoLTE Roaming Service”).
    2. VoLTE Roaming Service is only applicable to SUN Mobile postpaid data service plan customers who are enabled to access to SUN Mobile VoLTE service. Customer must register and activate IDD and Data Roaming Day Pass service, and use designated compatible device with specified system version in order to use VoLTE Roaming Service in designated areas with designated networks. For details, please Click here.
    3. VoLTE Roaming Service may not completely cover all locations within the periphery, depending on performance of 4G LTE networks run by local operators. Roaming service will automatically switch to 2G/3G, or other technologies, in locations not covered by a LTE network.
    4. Usage will be calculated on a per minute basis. Any usage of less than one minute will be counted as one minute.
    5. If customer has not registered for IDD and Data Roaming Day Pass service or has already applied for “barring of IDD or roaming voice service”, upon request on using VoLTE Roaming Service, it represents the customer agrees to activate IDD and roaming service and agree to “un-bar IDD and roaming voice service”.
    6. In case of any dispute, the decision of Sun Mobile Limited is final.
    7. In the event of any discrepancies between Chinese and English versions, the English version shall prevail.