Phonak hearing aids lose their Bluetooth connection most often because of competing device connections, physical obstacles between the phone and your ears, or a pairing list that needs to be refreshed. The good news is that most disconnection issues are fixable without a trip to your audiologist. Here’s what’s actually causing the drops and how to stop them.
Why Phonak Aids Drop Bluetooth More Than You’d Expect
Phonak uses Bluetooth Classic rather than the newer Bluetooth Low Energy (LE Audio) that some other brands have adopted. They chose this deliberately because Bluetooth Classic works with virtually all smartphones, tablets, computers, cars, and TVs, covering both iOS and Android without compatibility gaps. It also lets Phonak aids connect to two devices simultaneously, something most competitors can’t do.
That dual-connection ability is genuinely useful, but it also creates more opportunities for things to go wrong. Your hearing aids are maintaining active links to two devices at once, and if a third device (like your car’s Bluetooth system) tries to grab the connection, it can bump one of the existing ones. Many people experience sudden disconnections the moment they get into their car, and this is exactly why.
The Most Common Causes
Other Bluetooth devices stealing the connection. This is the single most frequent culprit. If your phone is paired to a car stereo, smartwatch, wireless speaker, or another Bluetooth accessory, that device may take priority over your hearing aids. Phonak specifically warns that having another device connected to your phone, such as a car Bluetooth system, can cause your hearing aids to disconnect.
Your phone is in your pocket or bag. Bluetooth signals at the 2.4 GHz frequency are absorbed by your body, clothing layers, and bag materials. Phonak notes that performance and range drop noticeably when the phone is inside pockets or handbags. Walls, furniture, and even other people standing between you and your phone reduce the signal further. The practical range is much shorter than the theoretical 30 feet you might expect.
Low battery on the hearing aids. As battery levels drop, the hearing aids may not maintain a stable Bluetooth signal. If you notice disconnections happening more toward the end of the day, battery drain is likely the issue.
Bluetooth toggled off or glitching on the phone. Sometimes a phone’s Bluetooth stack gets stuck in a bad state after a software update, after switching airplane mode, or simply after running for days without a restart. The connection appears active in settings but isn’t actually functioning.
How to Fix Disconnections Step by Step
Start with the simplest fixes and work your way down. Most people solve the problem within the first two steps.
Step 1: Restart everything. Turn your hearing aids off and on by opening and closing the battery door (or placing rechargeable aids in the charger for 10 seconds, then removing them). Restart your phone as well. This clears temporary connection errors on both sides.
Step 2: Disconnect competing devices. Go into your phone’s Bluetooth settings and look at what else is connected. Disconnect or unpair car systems, speakers, and other audio accessories you’re not actively using. If disconnections only happen in your car, your car stereo is almost certainly the problem. You can either unpair the car or manually reconnect your hearing aids after the car connects.
Step 3: Keep your phone close and unobstructed. Carry your phone in a front shirt pocket or on a table near you rather than in a back pants pocket or buried in a bag. A clear line of sight between your phone and your hearing aids makes a significant difference in connection stability.
Step 4: Unpair and re-pair your hearing aids. If restarts don’t help, a full re-pairing often does. On your phone, go to Settings, then Connections (or Bluetooth), and find your hearing aids in the paired devices list. Depending on your model, you’ll see either two items (one per ear, for newer Infinio Ultra aids) or three items (one per ear plus a third for streaming and calls, for earlier generations like Marvel, Paradise, or Lumity). Tap the settings icon next to each one and select Unpair. Then put your hearing aids into pairing mode and pair them fresh.
Step 5: Clear the myPhonak app connection. If you use the myPhonak app, open it and go to the Devices section in the navigation bar. Tap on Your Devices, then tap “Forget my devices” on the Product Information screen. After that, reconnect through the app from scratch. This resets the app-level link, which can get out of sync with the phone-level Bluetooth pairing.
Android vs. iPhone Differences
Android phones tend to cause more Bluetooth issues with Phonak aids than iPhones. Android’s Bluetooth management varies across manufacturers (Samsung, Google, OnePlus all handle it differently), and aggressive battery-saving features on some Android phones will shut down background Bluetooth connections to save power. If you’re on Android and experiencing frequent drops, check your phone’s battery optimization settings and make sure the myPhonak app is set to “unrestricted” or excluded from battery optimization.
iPhone users generally have a smoother experience, but iOS updates occasionally introduce Bluetooth bugs. If disconnections started right after updating your iPhone, check Apple’s support forums to see if others are reporting the same issue. A follow-up iOS patch usually resolves it within weeks.
When the Problem Might Be Hardware
If you’ve gone through every troubleshooting step and your hearing aids still drop Bluetooth repeatedly, the issue may be physical. Moisture damage, earwax buildup near the microphone ports, or a failing Bluetooth antenna inside the hearing aid can all cause intermittent connectivity problems that no amount of re-pairing will fix. Aids that disconnect from every device you try (not just one phone) point toward a hardware fault. Your audiologist can run diagnostics and send the aids to Phonak for repair or replacement if they’re still under warranty.
Also worth checking: if only one hearing aid disconnects while the other stays connected, the problem is almost certainly isolated to that specific aid rather than your phone or environment.