Cellular Rf iphone 16 pro max everything works but battery drain to fast any help
iPhone 16 Pro Max, iOS 26
Question marked as
A “Cellular RF hardware issue detected” message plus fast battery drain on an iPhone 16 Pro Max usually means the phone is struggling to maintain a stable radio connection.
Try the following one a time and monitor results after each step.
1. Open Settings ➡️ Cellular ➡️ turn Cellular Data OFF, wait 10 seconds, turn it ON.
2. Open Settings ➡️ Cellular ➡️ Voice & Data ➡️ switch between 5G Auto and LTE to see which mode stabilizes the connection.
3. Open Settings ➡️ General ➡️ Transfer or Reset iPhone ➡️ Reset ➡️ Reset Network Settings.
4. Remove the SIM (or disable eSIM), restart the iPhone, then re‑enable the SIM.
5. If the message appears again, the RF module may be failing — only Apple can run the hardware diagnostics.
A failing RF module causes constant reconnection attempts, which drains the battery very quickly. I recommend that you have the iPhone examined at the Apple Store or at an authorized service center and take advantage of it. You may also contact 👉 Apple Support
Axel F.