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Choose WCDMA (3G) only network mode for Android devices and Windows Phones, and 3G for iOS.
If you still have problem with the network, update your location by following these steps:
a. On the Mobile Networks menu option, switch Manual Network on, choose another operator first, then choose Telkomsel.
b. For iOS, go to Settings > General > Reset > Reset network setting
a. “The number you’re calling is not active or not in the coverage area” The call won’t be possible if the recipient number is inactive or in a location without coverage.
b. “The number you’re calling is busy” The call won’t be possible if the recipient is on another call, has activated ‘call divert’ or has blocked your number.
c. “The number you’re calling cannot be contacted” Make sure that the FDN (Fix Dialling Number) feature is off.
d. “You have reached the limit to do your call” If you are a postpaid user, make sure that your limit is enough to do the call by checking the limit through UMB *111#. If you have reached your limit, contact us at the Telkomsel call centre at 188 or email us at email@example.com to upgrade your limit.
If you’ve already attempted the above solutions and are still facing an issue, try moving your SIM card to another device to make the call. If you are able to make the call from another device, it means that there’s an issue with your regular device. If so, please contact your device service centre to check your device.