Question about Samsung SGH-a437 Cellular Phone

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My phone is a Samsung SGH-A437 and it was working fine when I went to bed but woke up this morning and it says "insert sim" the sim card is in there and looks fine... Any suggestions?

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  • alobarblu Jun 29, 2009

    I have done that many times. The phone says that it is getting tower but only for emergency calls (SOS). Thanks for the help but any other suggestions?



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  • 56 Answers

Soft reset your phone by removing the battery and the SIM card for one minute. Insert back the SIM card again and the battery.

Posted on Jun 29, 2009


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1 Answer

I have an SGH-a437 phone. I have had an intermittent problem whe I try to make a call with "Call not allowed" occurring. Tonight, every call I have tried has not connected and I get this error...


what i need you to do is to check if your SIM card is secured properly into its slot.
Remove your SIM card and insert it again.

Hope that fix your problem maam.

Don't forget to rate me... Thanks...

Best regards,

Jan 06, 2011 | Samsung Cell Phones

1 Answer


phone does not have a puk code, the puk code is on the sim card, if you take the sim card out and put in any other sim card the phone will work, but if you put this sim card back in it will ask for a puk code again.

You can ONLY obtain the puk code from the service provider that the sim card is from, they are the only people who can get you your puk code, since its unique, programmed into the sim card, we can't calculate it or get it, its the service provider you HAVE to contact.

Dec 05, 2010 | Samsung SGH-a437 Cellular Phone

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Samsung sim unlock code

you may visit some samsung mobile sites.....

Jul 27, 2010 | Samsung SGH-a437 Cellular Phone

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Samsung model SGH-A437 unlock code imei number 359339/01/137241/3

Put Non Accepted Sim
*2767*3855# let it reboot(restart)
now its ready for permanent.
Now its Permanent Unlock ....

Oct 30, 2009 | Samsung SGH-a437 Cellular Phone

1 Answer

My samsung A437 reads insert sim card ans sos. The sim card is in there and we know it works since it can be used in other phones

Then I would try a Master Reset on the phone.

To accomplish that enter *2767*3855# as if you were entering a phone number. This will reset all settings to default, but leave all data untouched.

Aug 08, 2009 | Samsung SGH-a437 Cellular Phone

1 Answer

I need to unlock my puk code for samsung a437 phone

PUK means "personal unlocking key" .

The PUK code is asked if you enter a wrong pin 3 times.

You need to call the phone company that released the SIM card, they can retrieve the puk code from a database for free.

In your case you need to contact your SIM card provider technical support to unlock the SIM.

The PIN and PUK are related to the SIM card, not to the phone.

If you replace the SIM card with a different one, then the phone will not ask for the PUK anymore.

Jul 14, 2009 | Samsung SGH-a437 Cellular Phone

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Master reset code for samsung a437 phome

Try this and choose reset phone *#8999*8378# - Service Menu

Jan 08, 2009 | Samsung SGH-a437 Cellular Phone

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Phone locked

d 1200 tata haier mobile phone lock please solve the problem

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Reset A Samsung SGH-A437

samsung SGH-A437 reset settings password
IMEI 35772302638841/9

Sep 07, 2007 | Cell Phones

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