iPhone 15 not detecting the mobile network

hello,

i'm facing a sudden issue with my iphone 15, the device unexpectedly stopped detecting the mobile network.

there was no physical damage or software changes before the problem appeared.

the signal is either completely unavailable, and sometimes it shows no service.

i have already tried restarting the phone, resetting network sittings, and checking the SIM card, but the issu still persists.

kindly advise on the possible cause and the next steps to resolve this issue?

thank you



[Re-Titled by Moderator]

Original Title: network issue

Posted on Dec 15, 2025 1:40 PM

Reply
5 replies

Dec 15, 2025 3:22 PM in response to Aaronhtn

The author seems to tested the SIM presumably in another phone.


BTW when swapping SIMs between slots or a new SIM in an iphone you must always...

1.    Settings, Apps, Messages,

2.    turn off iMessage   

3.    Settings, Apps, Facetime,

4.    Turn off Facetime,   

5.    Power down the phone

6.    Turn on the phone again 

7.    Settings, Apps, Messages, turn on iMessage,   

8.    Settings, Apps, Facetime, turn on Facetime


 


iPhone 15 not detecting the mobile network

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