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How many BLE devices that 1 Android phone can connect to?

Hi,

I am using NRF52832 with SDK 17.0.0.

I wanna try to connect multiple devices with only one Android phone.

When I try demo on Samsung galaxy S8, I can connect with 9 devices, try on OPPO F1s (A1601) just connect with 4 devices, try on Xiaomi just connect with 7 device - It true with the documentation I read about connection limitation.

The goal I want to achieve is connect with 20 device Ble. If you have any suggestion for that, pls let me know.

Thank you for your time.

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