Many users have reported about an endless notification sound on their Realme 2 Pro when turning on Hotspot. The issue has happened after the March 2020 security update. Here’s a temporary solution to stop the Hotspot notification sound on your device.
Turn off Hotspot notification sound on Realme 2 Pro
The above settings will disable the notification and vibration when turning on Hotspot on your Realme 2 Pro. The OEM may fix the bug soon via a software update until then you can do the above settings to fix the problem (source). Update (March 26, 2020): Realme has fixed the notification sound always exist issue when connected to the personal hotspot with new software update version C.28. The OTA update (RMX1801EX_11_OTA_0280) seeding to Realme 2 Pro units in India.
More on Realme 2 Pro
Download Google camera port for Realme 2 ProHow to fix ColorOS 6 boot loop issueHow to unlock bootloader of Realme 2 Pro