Malicious code within some injector variants can corrupt your device’s firmware. While "bricking" (turning the phone into a brick) is rare on modern Androids, "soft-bans" are not. Garena is known to issue bans. Once your device is flagged, any account created or logged in from that phone will be instantly banned forever.
For the uninitiated, a simple Google search yields millions of results promising "free diamonds," "unlimited skins," and "aimbot hacks." But what is Project X Injector really? Is it a legitimate utility, a dangerous malware trap, or something in between?