How to Fix a Phone That Keeps Dropping Calls

2026-10-14 · MarionPhoneRepair

You are mid-conversation and the call just ends — no warning, no error, the screen goes back to the home screen or shows call ended. It happens once and you assume the other person hung up. It happens repeatedly and you realize the phone is dropping calls. Dropped calls are caused by signal problems, network configuration issues, software bugs, or hardware failure. The fix depends on which of these is responsible, and narrowing it down is usually straightforward.

Is it signal or something else

The first question is whether the drops happen everywhere or only in specific locations:

• Only at home or one building: The location has weak cellular coverage. The signal has to pass through walls, and certain building materials (metal roofing, concrete, low-e glass windows) block cellular signals heavily. The carrier's tower may also be far away or obstructed
• Only in a moving vehicle: The phone is handing off between cell towers as you drive, and one or more handoffs are failing. This is common in areas where towers are spaced far apart or along routes with coverage gaps
• Everywhere, regardless of location: The problem is likely the phone itself — a software issue, SIM card problem, or hardware failure — rather than the network
• Only when calling one specific person: The problem is on their end, not yours

Fix 1: Check signal strength

The signal bars on your phone are a rough estimate. For an exact measurement:

• iPhone: Open the Phone app and dial *3001#12345#* then press Call. This opens Field Test mode. Look for rsrp (Reference Signal Received Power). Values between -80 and -100 dBm are usable; below -110 dBm is weak; below -120 dBm is barely functional
• Android: Settings, About phone, SIM status (or Status), Signal strength. The value is shown in dBm. The same scale applies — above -100 is decent, below -110 is weak

If signal is weak at home, options include a carrier-provided signal booster (most carriers offer them for free or a small fee to customers with verified coverage issues), Wi-Fi calling (see Fix 3), or switching to a carrier with better coverage in your area.

Fix 2: Toggle Airplane Mode

The simplest fix for intermittent dropped calls is cycling the cellular radio:

1. Turn on Airplane Mode (swipe down for Quick Settings or Control Center)
2. Wait 15 to 30 seconds
3. Turn off Airplane Mode

This forces the phone to disconnect from the current cell tower and re-register on the network from scratch. It clears any stale connection state that might be causing handoff failures. If calls work fine after cycling Airplane Mode but the problem returns days later, a deeper fix is needed.

Fix 3: Enable Wi-Fi Calling

Wi-Fi Calling routes phone calls over your Wi-Fi connection instead of the cellular network. If you have strong Wi-Fi but weak cellular signal at home or work, Wi-Fi Calling eliminates dropped calls in those locations:

• iPhone: Settings, Cellular (or Mobile Data), Wi-Fi Calling, toggle on Wi-Fi Calling on This iPhone
• Android: Settings, Connections (or Network), Wi-Fi Calling, toggle it on. The exact path varies by manufacturer

Wi-Fi Calling requires your carrier to support it (most major US carriers do) and a stable Wi-Fi connection with at least 1 Mbps upload speed. Calls made over Wi-Fi can seamlessly hand off to cellular when you leave Wi-Fi range, and vice versa.

Fix 4: Check the SIM card

A SIM card that is damaged, dirty, or not seated properly can cause intermittent call drops:

1. Power off the phone
2. Remove the SIM tray (use the SIM ejector tool or a straightened paperclip in the small hole on the side of the phone)
3. Remove the SIM card and inspect it. Look for scratches on the gold contacts, corrosion, or a chip with a cracked or peeling surface
4. Clean the gold contacts gently with a soft dry cloth
5. Reinsert the SIM card firmly in the tray, making sure it is seated flat with no edges lifting
6. Reinsert the tray and power on

If you have had the same SIM card for several years, the contacts may be worn. Contact your carrier for a free replacement SIM — they will transfer your number and service to the new card in minutes.

If you use eSIM (no physical card), this step does not apply. Instead, try removing and re-adding the eSIM: Settings, Cellular, select the eSIM plan, Remove, then re-add it using the original QR code or the carrier's app.

Fix 5: Update carrier settings and software

Carriers push updates that improve how the phone connects to their towers, handles handoffs, and manages VoLTE (Voice over LTE):

• iPhone: Settings, General, About. If a carrier settings update is available, a prompt appears automatically. Also check Settings, General, Software Update for iOS updates
• Android: Settings, Software update (or System, System update). Samsung phones also have a separate carrier-specific update that installs automatically

Carrier settings updates are small and quick but can fix specific call-dropping bugs related to tower handoffs and VoLTE configuration for your carrier's network.

Fix 6: Reset network settings

This resets all cellular, Wi-Fi, Bluetooth, and VPN configurations to factory defaults. It clears any corrupted network configuration that might be causing connection instability:

• iPhone: Settings, General, Transfer or Reset iPhone, Reset, Reset Network Settings
• Android: Settings, General management (or System), Reset, Reset network settings

After resetting, you will need to reconnect to Wi-Fi networks (passwords are erased) and re-pair Bluetooth devices. Cellular service reconnects automatically. This is one of the most effective fixes for persistent dropped calls that are not caused by weak signal.

Fix 7: Check for hardware problems

If none of the above fixes resolve the issue, the phone may have a hardware problem:

• Antenna damage. The cellular antenna in most phones runs along the edges of the metal frame. A phone that was dropped and has dents or bends along the edge may have a damaged antenna. Drops into water can also corrode antenna connections internally even if the phone otherwise appears to work
• Proximity sensor issues. If the screen goes black during calls and does not wake up (or does wake up unexpectedly), the proximity sensor near the earpiece may be malfunctioning. This can cause accidental touches on the screen that end the call by hitting the end button. Test by putting a call on speakerphone — if calls no longer drop on speaker, the proximity sensor is likely involved
• Baseband modem failure. The baseband modem is the chip that handles all cellular communication. A failing modem causes progressively worse call quality, more frequent drops, and eventually complete loss of cellular service. This is a motherboard-level component that cannot be replaced individually

Dropped call diagnosis in Marion

Marion Phone Repair diagnoses dropped calls by testing signal strength, SIM card health, antenna performance, and software configuration. If the cause is hardware — a damaged antenna or failing modem — we identify whether repair or replacement is the better path.