This happens to a lot of people's 8/X and they're just not aware of it. I have personally been abused by AppleCare Tier 2 Customer Relations. Steps to Reproduce: Listen to Apple music and multitask: scroll in Twitter, type in messages, etc. “4 pics 1 word” app. The crackling noise you manage to reproduce will not be in any previous iPhones or any iPads. It only happens to the 8, 8 plus, and X. https://drive.google.com/drive/folders/1ZtW_cd5Mmnv6qnauP-3gAL8tW-CFAFgY?usp=sharing Jump to 2:17 You wanna press the keys really fast. Apple's been aware of the issue since November if not earlier. It happens when you're multitasking. A popping sound will occur. It has nothing to do with the speaker or receiver. Apple has confirmed that it is a hardware issue, as seen in the pictures attached. My own speculation and intuition and experience suggests: It has to do with the Power Management unit, which cannot distinguish the amount of electricity it sends out. So when you're multitasking and needs more processing power, it sends out a huge current to every part of the device. That current can successfully break other hardware pieces. It's costed me one pair of EarPods and the receiver of the phone. Affected units will also have an overheating issue with a shorter battery life, because of how it's electrocuting A11 as well. They're using different suppliers for the PMU. And some of them are faulty. Because of its cause, this issue will not go away if you simply replace the speakers or whatnot. It also happens with the EarPods, because of the same reason. It doesn't happen through bluetooth at all, which proves the innocence of the DAC. It happens when you're multitasking. A software patch is not possible without compromising the device's capabilities. They're refusing to service my device. They're refusing to admit the issue, so they can keep profiting. But if it either were a software issue or a speaker issue, it would have been fixed a long time ago. Their stores and geniuses aren't even aware of it. Think about that. From Canada, the only country Her Majesty is proud of. To add to all that, Apple claims that because it merely could be a "software issue" they don't have to warrant it. Wrong. Not only do they have to warrant it, they have to do it in due time. And they've failed exactly that, with evidence suggesting they haven't acted to attempt to resolve the issue (replacing devices) when they clearly know that it is a hardware failure. That broke their own warranty. The Magnuson–Moss Warranty Act of the USA defines "implied warranty" and prohibits disclaiming it at all. Like a microwave would be able to cook food. A window would be able to open and close. You can't sell a window and give me a piece of pure glass and then tell me "software." Or expected behaviour. Or you can fix this yourself ha! Apple clearly states on their website iOS is "The world’s most advanced mobile operating system." and Android does not have this problem. They state the speakers are, compared to 7, "up to 25 percent louder and deliver deeper bass." Which means better. They've broken the law for sure. But what if I know it's a software issue (it isn't) and couldn't fix it? Refund in full. Cuz that's the law. Since they haven't done it in due time or resolved it at all, they would have to issue a refund. Because again, software is under warranty by Congress laws. Apple is ruled by the Law. You either fix it/replace it/or refund it. Apple will be facing class lawsuits for refunding those iPhones in full price. Because they haven't resolved it yet. Can't wait to see that. With all that, CR tier 2 said "refund is not an option, you only have 14 days." Yeah right. Also, the fact that they confirmed a hw issue on Feb 1 to me and haven't told consumers to replace or do anything is deceptive behaviours. I haven't found the law just yet. But if there is one, it would be somewhere around fraud/scam or something else criminal. Don't worry. They won't be jailed. cuz they can afford bail.