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nRF51822 pairing problem

I implemented my profile based on GLS example. my profile has five services and every services have several characteristics. Pairing with several smartphone work properly. But when i added another service (ANCS or DFU service), pairing problem was coming.
pairing with the first and the second smartphone is ok and everything work fine. But it can't pair with the third smartphone any more. If i erase the bonding info of ble chip, it can be paired with two smartphone. and still can't pair with the third smartphone. I suspect that this is caused by this memory conflict of service uuid and binding info area. could you please help to check this problem?

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