iPhone keeps dropping calls? 9 fixes that work

Few things are more annoying than a call that cuts out mid-sentence, especially on an expensive iPhone. In most cases, though, the phone itself is fine. Calls drop when the signal is simply too weak to hold the connection, when the phone hands you from one tower or network type to another and the handoff fails, or when a setting gets in the way. The fixes below go from the quickest to the ones that need your carrier.

Why your iPhone drops calls

• Weak signal: indoors, in basements, in rural areas and in buildings with metal or energy-efficient glass.
• Handoffs: switching between towers while driving, or between 5G and LTE at the edge of 5G coverage.
• Congestion: stadiums, concerts and busy downtown areas where the tower is overloaded.
• Outdated carrier settings or iOS: carriers and Apple fix call bugs in updates.
• Accessories and settings: car Bluetooth, dual SIM data switching or a case that blocks the antenna.
• Hardware: rarely, a damaged antenna after a drop.

How to stop an iPhone dropping calls

Check your real signal with Field Test Mode

Signal bars are a rough guide. For a more precise reading, open the Phone app, dial *3001#12345#* and press call. Field Test Mode opens with technical details; look for RSRP, a negative number. As a rough guide, values closer to zero, such as -80, are strong, while values around -110 or lower are weak and likely to drop calls. Check it in the rooms where calls fail, and compare with a room where calls are fine. If it is weak there, Wi-Fi Calling or a signal booster is the fix, not anything on the phone.

“Call Failed” on screen

A Call Failed message usually means the network dropped the connection. If it happens at the very start of calls, check that your account is active and that you have no unpaid balance, especially on prepaid. If it happens only on Wi-Fi Calling, restart your router or turn Wi-Fi Calling off for a day to test. If it happens everywhere with good signal, reset network settings and ask your carrier to refresh your line.

Two lines? Watch Cellular Data Switching

With dual SIM, the iPhone can only use one line’s connection at a time for some functions. In Settings › Cellular › Cellular Data, Allow Cellular Data Switching lets data move to the other line during calls; on some carrier combinations, turning it off makes calls on the main line more stable. Also check that the line you call from has good coverage, since a travel or second eSIM may not.

Drops in the car

• Try a call with Bluetooth off. If it holds, forget and re-pair the car in Settings › Bluetooth, and update the car’s software if the maker offers it.
• Some stretches of road simply have gaps between towers; drops in the same spot every time are coverage.
• A phone mounted low in the car, or sitting in a cup holder or console, gets noticeably weaker signal than one mounted up near the window.

Calls drop on Wi-Fi Calling

If calls drop only at home on Wi-Fi, the router is the usual suspect. Restart it, install any firmware update, and make sure the iPhone is on a strong Wi-Fi signal rather than at the edge of the network. Some routers have a setting called SIP ALG that can interfere with internet calling; if your router has it, turning it off often helps, and your internet provider can tell you how. Mesh Wi-Fi systems can also drop a call when the phone moves between units, so test standing still near one.

Crowded places and outages

At games, concerts and festivals, thousands of phones share a few towers, and calls drop even with full bars. Texting, or using a messaging app over the venue’s Wi-Fi, works much better there. If calls suddenly start dropping everywhere for you and for friends on the same carrier, check the carrier’s outage page or app. Outages are usually fixed within hours, and nothing on your phone will help until then.

Calls picked up by another device

Sometimes a call does not drop, it moves. A Mac, iPad or Apple Watch nearby can take over an active call, or a car or headset can grab the audio when it connects. If the call seems to cut out just as you get in the car or sit at your desk, check Calls on Other Devices in Settings › Apps › Phone, and your Bluetooth connections.

Fix weak signal at home

• Wi-Fi Calling: free, and the best first fix. Calls use your home internet when cellular is weak. See how to turn on Wi-Fi Calling.
• Cell signal booster: an FCC-approved booster takes a weak signal from outside and repeats it indoors. It needs at least some usable signal at the outside antenna.
• Carrier network extender: some carriers offer a small device that creates a cell signal over your internet connection. Ask your carrier if one is available for your plan.
• Move calls to a window or upstairs: a quick workaround while you set up a better fix.

After a drop, an update or a repair

If calls started dropping right after the iPhone was dropped, got wet or had a screen or battery repair, an antenna connection may be damaged or loose. Signal will usually be weaker than on other phones in the same spot. Compare it with a friend’s phone on the same carrier, standing in the same spot. If yours is clearly worse, book a check with Apple or the shop that did the repair. If the problem began right after an iOS update, install any follow-up update and a carrier settings update, since modem fixes often arrive within a couple of weeks.

What to tell your carrier

• The addresses where calls drop, and roughly what time of day.
• Whether it happens on cellular, Wi-Fi Calling or both.
• Your RSRP reading from Field Test Mode in those places.
• Whether other phones on the same carrier have the same problem there.

With that information, carriers can check tower problems near you, refresh your line, replace your SIM or eSIM, or offer a network extender. Vague complaints rarely get anywhere; specific places and times usually do. Ask for a ticket or reference number, so you can follow up if the problem continues after their fix, and note the date you reported it.

When it is time to switch carriers

If calls drop in the places you spend most of your time, and Wi-Fi Calling is not enough, another network may simply be stronger where you live. Ask neighbors and coworkers which carrier works well for them, look at each carrier’s coverage maps, or try a prepaid trial eSIM from another network for a week. Many budget brands run on the same towers as the big three, so you may save money too, and keep your number when you move. See how to switch phone carriers.