Apple is poised to issue iOS 18.3.2, a mystery new iPhone update that will come ahead of its major ... [+] point upgrade iOS 18.4.Getty ImagesApple is poised to issue iOS 18.3.2, a mystery new iPhone update that will come ahead of its major point upgrade iOS 18.4.The news of iOS 18.3.2s release comes via Apple-focused site MacRumors, which says Apple employees are internally testing iOS 18.3.2 for iPhones, according to its visitor logs.The release of iOS 18.3.2 comes hot on the heels of iOS 18.3.1, which was issued in Feb. containing important security updates.So, as we await the release of iOS 18.3.2, whats in Apples mystery new iPhone update and when will it arrive?iOS 18.3.2 Security UpdatesWhen Apple issues iPhone upgrades in between major point updates such as iOS 18.3.2, its often to patch major security issues. A timely patch is especially key if adversaries are using the vulnerabilities in iPhone software to perform real-life attacks. This was the case with iOS 18.3.1, which patched a flaw in Accessibility that where a physical attack could have disabled USB Restricted Mode on a locked device, allowing unauthorised devices to connect with your iPhone.Theres also quite a big gap between Apples big point updates and its been a month since iOS 18.3.1. That makes it highly likely that Apple has security updates to patch in iOS 18.3.2.Something else to note is, Apple is no longer issuing security updates to older devices. Therefore, when it does release iOS 18.3.2, you need to apply it if your device is compatible. Apples iOS 18.3.1 was compatible with iPhone XS and later, iPad Pro 13-inch, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 7th generation and later, and iPad mini 5th generation and later. You can expect the same from iOS 18.3.2.iOS 18.3.2 Bug FixesIts also possible that Apple will use iOS 18.3.2 to fix bugs plaguing iPhone users since the release of iOS 18.3.1. According to reports on forums, these include an iPhone storage bug, while others are having issues with iMessage.iOS 18.3.2 ArrivalApples iOS 18.3.2 is coming soon, so when should you be looking out for it? The iPhone update could arrive this week, but its more likely next week or perhaps the week after, towards the mid to end of the month. Keep checking your iPhone by going to Settings > General > Software Update or keep checking my Forbes page for updates on iOS 18.3.2s arrival.