You cannot register your 9700 to your Indonesian carrier and get data services like BBM until you de-register it from T-Mobile. Call T-Mobile and request that your PIN be de-registered from your account. Then when you cancel, your BlackBerry will be ready for a new carrier.
Once you get BIS set up in Indonesia you'll be back in business. But the rule is you can't get data services on a new carrier until the link with the old carrier is broken.
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