How To Fix iPhone 15 Pro Max Cellular Service Issues Teal and Yellow background

How To Fix iPhone 15 Pro Max Cellular Service Issues?

Written by: Franzria Ferriols



Time to read 7 min

Understanding iPhone 15 Pro Max Cellular Service Issues

A reliable cellular connection is necessary for getting the most out of your iPhone 15 Pro Max. Whether you're streaming music, making calls, or browsing the web, weak signal strength can significantly hinder your experience.

You can explore several solutions to get your cellular service back on track. In this article, we'll break down the common culprits behind these cellular problems, guide you through troubleshooting steps, and explore alternative solutions to keep you connected.

iPhone 15 Pro Max Cellular Service Common Misconceptions

Cellular service relies on a network of towers to transmit and receive signals. Sometimes, a weak connection might not necessarily be your phone's fault. However, let's clear some common misconceptions that can lead you down the wrong troubleshooting path.

  • Dropped calls or slow data speeds aren't always due to exceeding your data plan.

  • Similarly, being indoors doesn't automatically mean a bad signal – certain building materials can weaken reception.

  • Apple does not purposely slow down your network every time it releases a new iPhone. Your old phone could be slower due to a lack of system updates.

  • Just because you have the latest iPhone 15 Pro Max doesn't guarantee a magically strong connection. Signal strength depends on your carrier's network infrastructure and your location.

  • The number of signal strength bars on your phone isn't always a perfect indicator of data speeds. Congestion on the cellular network can lead to slow data speeds even with full signal bars.

To say the least, these issues are more likely caused by network congestion, weak signal strength in your area, or problems with your phone's hardware or software.

Getting answers from personal experience, you may find this Reddit comment helpful:

byu/deathwish6999 from discussion

Keep reading to determine the first line of action when troubleshooting iPhone 15 Pro Max cellular service issues .

Recognizing Symptoms and Using Diagnostics

First, it’s important to identify the issue with your weak cellular service. Are you experiencing dropped calls, slow data speeds, or not receiving text messages?

If so, your phone may be switching between different towers too frequently.

To check for this issue, go to “Settings” and then “Cellular.” Ensure the option for “Automatic” network selection is turned off.

iPhone 15 Pro Max Network Selection Settings

If slow data speeds are the problem, you can do a few self-service repairs, which we’ll elaborate on in this article.

In the meantime, we’ll show you how to use the iPhone 15 Pro Max built-in diagnostics as part of System Configuration. Diagnostics mode can be helpful for advanced troubleshooting of cellular service issues.

To turn this mode on:

  1. Power Off: Hold down either the volume up or down button and the side button together until you see the "slide to power off" slider. Slide the slider and wait 30 seconds for your phone to turn off completely.

iPhone 15 Pro Max Power buttons

  1. Hold Volume Buttons: Press and hold both the volume up and down buttons at the same time.

iPhone 15 Pro Max volume up and down buttons

  1. Plug in While Holding: While still holding both volume buttons, connect your iPhone to a power adapter (ideally 18 watts or higher) or a computer that's powered on and plugged in.

  2. Release on Apple Logo: Let go of the volume buttons once you see the Apple logo appear on the screen.

iPhone 15 Pro Max Diagnostics and Repair

This process can be a bit more advanced. Below, we'll focus on easier troubleshooting steps you can try yourself.

Troubleshooting Steps: A Step-by-Step Approach

Over a hundred iPhone 15 Pro Max users have been experiencing cellular service issues since its release in Q3 of 2023—and counting. Apple has since introduced common fixes to this issue that you can do yourself. Let's dive into the 11 solutions below.

Fix #1: Check for Software Updates

Outdated software can sometimes lead to connectivity problems. To check for software updates:

Head to Settings > General > Software Update 

Fix #2: Restart or Force Restart

A simple restart can often resolve temporary glitches. Briefly press the volume down and the side button to restart. For a force restart, quickly press and release the volume up button, then the volume down button, and finally, hold the side button until you see the Apple logo.

Fix #3: Reset Network Settings

This wipes out your Wi-Fi passwords and Bluetooth connections, but it can also resolve cellular issues. To do this:

Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings

Fix #4: Check for Carrier Settings Updates

Carrier settings updates can optimize your phone's connection with your cellular provider's network. Simply:

Go to Settings > General > About. If an update is available, you'll see an option to update.

Fix #5: Verify Cellular Settings and Airplane Mode

Ensure Cellular Data is turned on in Settings > Cellular . Also, double-check that Airplane Mode is disabled in the Control Center .

Advanced Troubleshooting: Addressing Complex Issues

If the basic steps don't work, here are some further explorations:

Fix #6: Dealing with SIM Card Issues

A damaged or loose SIM card can cause connectivity problems. Check for any physical damage and try removing and reinserting the SIM card. If the issue persists, you might need a replacement from your carrier.

Fix #7: Addressing Hardware Problems

In rare cases, hardware problems within your iPhone can affect cellular service. If you suspect hardware damage, contact Apple Support.

Fix #8: Understanding the Carrier Network

Sometimes, the issue might lie with your carrier's network. Check their outage maps or contact customer support to see if there are any known problems in your area.

This 2023 "How to Boost Your iPhone Signal" tutorial video might help if you're using two sim cards or carriers.

Alternative Solutions: Staying Connected Even with Weak Signals

The good news is, there are ways to stay connected even if your cellular signal is weak.

Fix #9: Using Wi-Fi Calling and VoLTE

These features let you make and receive calls and texts over a Wi-Fi connection. Enable them in Settings > Phone .

Fix #10: Utilizing Signal Boosters and Amplifiers

These devices can amplify cellular signals in areas with poor reception. Research different types and choose one that suits your needs.

🔒 Security Note: Signal boosters are illegal or require a license to operate in some countries. Always check the regulations in your area before using a signal booster. Additionally, using a signal booster that isn't properly configured can actually worsen cellular reception for yourself and others in the vicinity.

Fix #11: Check Your iPhone 15 Pro Max Case

Surprisingly, some phone cases, especially those made of carbon fiber, can block cellular signals. Consider using an iPhone 15 Pro Max aramid fiber case instead, which offers better signal transmission.

Thinborne’s thin phone cases are made of lightweight, super strong material that offers great protection for your phone without messing with your signal strength (minus the bulk!). They are so thin and light you'll barely notice it's there.

💡Remember: Aramid fiber is the best material for phone cases, but not all are created equal. Look for cases made from premium aramid fiber and avoid ones with bulky metal parts that might block or interfere with your signal.

Seeking Professional Help and Understanding Warranty

If none of these solutions work, it's time to seek professional help. Contact Apple Support to diagnose the problem and discuss repair options. Remember, your warranty might cover certain hardware issues.


Understanding the common causes of cellular service problems can keep your iPhone 15 Pro Max connected and functioning optimally.

Proactive maintenance, such as updating software and using appropriate phone cases, can help prevent iPhone 15 Pro Max cellular service issues.

When done right, simple fixes, such as restarting your phone, updating software, resetting network settings, and checking for carrier updates, can do the job.

Check your SIM card, consider hardware issues, and verify your carrier network status for advanced troubleshooting methods.

Utilize Wi-Fi calling or use a signal booster (research legality in your area) as an alternative solution.

Seek professional help. Contact Apple Support if none of these solutions work. Understand warranty coverage and repair options.

If you want to buy iPhone 15 Pro Max MagSafe case , you can check out more on our store.

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Frequently Asked Questions

Can switching to a different cellular carrier improve my signal strength?

Yes, it's possible. Carriers have different network infrastructures, and coverage can vary depending on your location. You can check carrier coverage maps online or in their stores to see which carrier might have a stronger signal in your area.

What if my warranty doesn't cover the iPhone 15 Pro Max cellular service issue?

If your iPhone 15 Pro Max is outside the warranty period or the damage isn't covered, Apple may offer paid repair options. There are also third-party repair shops that specialize in iPhone repairs, but using unauthorized repairs could void your warranty and potentially cause further problems.

How can I prevent future cellular service issues?

Here are some tips:

  • Keep your iPhone software updated with the latest iOS version.
  • Avoid using bulky phone cases that might block cellular signals (especially metal cases).
  • If you travel frequently to areas with weak cellular reception, consider investing in a portable cellular signal booster (checking legality regulations beforehand).
  • If you suspect hardware damage to your iPhone, contact Apple Support for a proper diagnosis and repair.

Related Readings

Franzria F.

Content Writer of Thinborne - The super thin phone case made of aramid fiber.

"I write anything tech and help businesses reach their target audience with a messaging that best fits the reader's needs. I can obsess over grammar and bite-sized, readable sentences because I care about people more than search engines. When I'm not writing, you can find me spending time with my friends and loved ones exploring local sceneries."

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