iPhone connectivity through WiFi

We have a house in the mountains with very weak cell coverage. I changed WiFi Internet service providers and now I can't make outgoing calls from my iPhone using WiFi. We changed from ATT DSL service to Optimum cable internet service. With DSL I was able to make outgoing calls using WiFi. Now I can't with Optimum. ATT says all iPhone settings settings are correct. And Optimum dose not think it is their problem. I can make and receive text and surf the net on my iPhone. But can't make or receive calls.

iPhone 11 Pro, iOS 16

Posted on Jul 29, 2023 9:50 AM

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5 replies

Jul 31, 2023 8:41 PM in response to bobs-mac

bobs-mac Said:

"iPhone connectivity through WiFi: We have a house in the mountains with very weak cell coverage.[...]"

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Troubleshooting iPhone WiFi:

A few thoughts to try:


I. Start Here: If your iPhone, iPad, or iPod Touch won't Connect to a Wi-Fi Network - Apple Support


II. Clear the Temporary Internet Files:


III. Restart your Router:

  1. Power: off the router
  2. Wait: 30 seconds
  3. Power: It back on


IV. Reconnect to your Network:

  1. Go to: Settings
  2. Tap: Wi-Fi
  3. Disable: Wi-Fi
  4. Wait: 30 seconds
  5. Enable: Wi-Fi


V. Add Back the Network:

  1. Go to: Settings
  2. Tap: Wi-Fi
  3. Remove: the network
  4. Wait: 30 seconds
  5. Add: the network back


V. Reset All Network Settings to Default:

Example of items that will be reset: (Wi-Fi Passwords, VPN Connections, etc):

  1. Go To: Settings
  2. Tap: General
  3. Tap: Reset
  4. Tap: Reset Network Settings.
  5. Enter: [Your Passcode]

Jul 31, 2023 10:05 PM in response to bobs-mac

bobs-mac wrote: "81%"

A maximum capacity of 81% is not healthy and results in the weak battery not providing sufficient power to the iPhone's antenna to connect with cell tower signals. ...So have the aging battery replaced and then you'll probably be able to make & receive calls:


iPhone Battery & Power Repair


About genuine iPhone batteries


Repair Provider Verification


(Articles found by searching Apple's Knowledge Base.)


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iPhone connectivity through WiFi

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