Fix iPhone 11 Crackling Noise During Calls
By Robert Jones · 2021-08-24
Crackling noises during calls may be due to network error. But, it
Right, so you've got an iPhone 11, and it's making a right racket during calls, all crackly and annoying. It's a common enough headache, actually. I've had a few mates come to me with this exact problem over the years. Annoying, isn't it? Especially when you're trying to have a proper chat. ### Why's My iPhone 11 Crackling Like a Frying Pan? First off, don't panic. It's usually not the end of the world. There are a few usual suspects with this crackling business. * **Rubbish Signal:** This is the big one, isn't it? If your phone's struggling to hold onto a decent network, it'll sound like you're talking through a packet of crisps. I've been in areas, particularly out in the sticks around Bristol, where the 4G just drops off a cliff. My old iPhone 11 Pro did this a bit when I was driving through the Mendips. It's frustrating, but sometimes it's just the network being a bit unreliable. * **Software Glitches:** iPhones are pretty solid, but they're not immune to a bit of software weirdness. A rogue app or a system bug can sometimes cause audio problems. I remember a while back, an iOS update seemed to mess with the sound on my Mrs's iPhone X for a week or two – a bit of crackling and static. It sorted itself out with the next patch, thankfully. * **Mucky Earpiece/Speaker:** You'd be surprised how much gunk can get into those tiny grilles. Pocket fluff, dust, a bit of earwax – it all builds up. I've seen speakers on even quite new phones absolutely clogged. Give it a good look with a torch. If it's blocked, it'll distort the sound. * **Bluetooth Troubles:** Using a Bluetooth headset or car kit? The crackling could be coming from there, not the phone itself. Interference, a low battery on the headset, or a dodgy connection can all do it. I had a really old pair of Bluetooth headphones that always had a faint crackle. Switched them out, problem gone. * **Hardware Fault:** Now, this is the one we hope it isn't. A problem with the internal speaker, microphone, or even something deeper inside. If you've dropped the phone a few times, it's more likely. I've had to replace a few phone speakers in my time; it's not a fun job. ### Let's Try and Sort This Mess Out Right, before you ring up Apple support or smash your phone against a wall, let's go through some easy fixes. I always start with the simplest stuff. #### 1. Check Your Signal This is obvious, but often overlooked. Are you in a place with good reception? Look at your signal bars. Try moving to a different room, or even just stepping outside. If the crackling stops, you know it's a network issue. Sometimes, just switching from Wi-Fi calling to cellular, or vice-versa, can clear things up. My old workshop has pretty thick walls, so I often have to step out into the garden for a clear call. #### 2. Reboot Your iPhone It's the classic IT fix for a reason – it often works. A simple restart can clear out temporary software glitches that might be causing the audio problem. Hold down the power button and either volume button until the slider appears, then slide to power off. Wait a minute, then turn it back on. My kids moan when I tell them to do this, but it solves at least half their tech problems. #### 3. Clean Those Grilles Get yourself a soft, dry toothbrush or a small, clean brush. Gently brush the earpiece speaker grille and the main speaker grilles at the bottom of the phone. Don't use anything wet or too sharp. You can also try a small blast of compressed air, but be careful with the pressure. You'd be amazed how much crud comes out. I clean the grilles on all my test phones regularly, stops them sounding muddy. #### 4. Turn Off Noise Cancellation Some iPhone models have a 'Phone Noise Cancellation' feature. It's meant to reduce background noise, but sometimes it can actually cause issues. Go to `Settings > Accessibility > Audio/Visual` and toggle `Phone Noise Cancellation` off. See if that makes a difference. Had a mate who swore this fixed his crackling completely. #### 5. Reset Network Settings If you suspect it's a network problem, but you're in a good signal area, resetting your network settings can sometimes help. This won't delete your data, but it will clear Wi-Fi passwords, VPN settings, and cellular settings. Go to `Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings`. You'll have to re-enter your Wi-Fi passwords afterwards, mind. #### 6. Update iOS Make sure your iPhone 11 is running the latest version of iOS. Apple often releases updates that fix bugs, including audio-related ones. Go to `Settings > General > Software Update`. If there's an update available, install it. I always keep my main phone updated, it's just good practice. #### 7. Test with Headphones (Wired and Bluetooth) This helps narrow down the problem. Plug in a pair of wired headphones. Does the crackling stop? If so, the issue is likely with the earpiece speaker or internal components. Now try some Bluetooth headphones. If the crackling persists with Bluetooth but is fine with wired, then your Bluetooth connection or device might be the culprit. If it happens with everything, then it's probably internal to the phone. #### 8. Remove Your Case and Screen Protector Sometimes, a poorly fitting case or screen protector can interfere with the microphone or speaker grilles, causing muffled or distorted sound. Take them both off and try a call. It's a long shot, but I've seen stranger things happen. I had a really bulky phone case once that actually made calls sound echoey. #### 9. Check for Water Damage The iPhone 11 is pretty water-resistant, but it's not waterproof. If your phone has had a dunk, even a small splash, water can get into the speakers or microphone and cause problems. Look for the liquid contact indicator (LCI) in the SIM tray slot – if it's red, you've got water damage. If this is the case, you're probably looking at a repair. #### 10. Factory Reset (Last Resort) If you've tried everything else and the crackling is still there, a factory reset might be worth a shot. This wipes your phone completely, so **make sure you back up everything first!** Go to `Settings > General > Transfer or Reset iPhone > Erase All Content and Settings`. If the crackling is still there after a fresh factory reset, then it's almost certainly a hardware fault. ### When to Call in the Big Guns If none of these troubleshooting steps work, it's time to face facts: you likely have a hardware problem. This means a trip to an Apple Store or an authorised repair shop. They've got the diagnostic tools to pinpoint exactly what's wrong. Don't try to take the phone apart yourself unless you really know what you're doing – you'll probably just make it worse, and you'll definitely void any warranty. It's a pain, I know. But sometimes, hardware just gives up the ghost. I had a subwoofer amp once that just started humming for no reason. Tried everything. In the end, it was just bust. Same thing can happen with phones. ### Pros and Cons of Dealing with iPhone 11 Crackling **Pros:** * Many issues are simple to fix yourself. * Often just a software glitch or network problem. * Learning a bit more about your phone. **Cons:** * Can be a frustrating and time-consuming process. * Might indicate a costly hardware repair. * Could temporarily lose settings or data if not careful. ### Frequently Asked Questions **Q: Will updating my iPhone always fix crackling during calls?** A: Not always, but it's a good first step. Software updates often include bug fixes, and sometimes that includes audio problems. If it's a deeper hardware issue, an update won't help. **Q: Can a cracked screen cause crackling audio?** A: Indirectly, yes. If the crack compromised the phone's sealing, moisture or dust could get in and damage the internal components that handle audio. A cracked screen itself usually won't cause audio crackling, but the impact that caused it might have. **Q: My iPhone 11 crackles on speakerphone but not on the earpiece. What does that mean?** A: That usually points to a problem with the main speaker at the bottom of the phone. This is separate from the earpiece speaker you use when holding the phone to your ear. It could be dirt, or a fault with that specific speaker. **Q: How do I know if it's a network problem or my phone?** A: Try making calls in different locations with strong signal. If the crackling only happens in certain spots, it's likely network-related. If it happens everywhere, regardless of signal strength, then the phone itself is probably the problem. Also, try calling different contacts – if it only happens with one person, it might be their connection!