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Hello, my goal is to flash TWRP onto both Slot A and Slot B. I've flashed TWRP into Slot A, while Slot B is flashed with LineageOS recovery, currently.

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What is the function of slots A and B? Is that a multiboot version of Android, just like in Windows? Can I install the original recovery image in slot A and then install TWRP in slot B? Can I install ""Pong U2.5-240327-2140 (2.5.3)" in Slot A...