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Sim Card Invalid Issue

Suddenly today when I restarted my phone, my Galaxy S4 (SPH-L720) didn't recognize the sim card from then on.

*I tried another Sim Card = NO

  • Tried MY sim Card on another Phone = YES

From quite a days I was unable to use my sim data connection, but my sim card was working on my S4. i could make calls, sms etc.

But now, my phone doesn't accept my sim card at all.

Please help me out guys. Thank You.




Answer this question I have this problem too

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1 Answer

Most Helpful Answer

Firstly turn wifi off then leave it for a minute or two then turn wifi on again.

Then try leaving the phone off for two minutes with the battery not in.

A user said:

Go to Settings > General > Date & Time > and be sure "Automatic Date & Time" is checked. ##72786# unchecked this on my phone and reset the date to Jan 1, 2012. That's why the phone behaves erratically.


Otherwise try this in the dialer: '##873283#'

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This isn't working at all. Unfortunately. :(


Okay since we've basically exhausted all other options. Last thing you can do is perform a wipe data / factory reset through recovery and re-flash the same lollipop firmware you have or go back to the Kitkat 4.4.2 version firmware.


Already done all that**


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