Question about AT&T Quickfire Cell Phone

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I turn my AT&T Quickfire on and it shows INVALID SIM. What should i do?

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1 Answer

Showing invalid sim


The most common thing for any mobile/cell phone.
Easy fix simply take an eraser & rub over the contact of the sim card then making sure not to touch the sim cards chip re-insert in to the phone & it should be problem solved. If the problem still exists insert in to another phone if possible to test the integrity of the sim card if the sim card works in another phone it could be the phone you are attempting to use it maybe faulty or the sim card is incompatible or the phone is not unlocked entirely, if it doesn't work in another phone the sim card has failed & a new sim card is required.

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PUK CODE


Call AT&T WIreless Tech support, and they can supply you with the PUK code after some troubleshooting, for free.

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My phone is always invalid sin in my dual sim


What is Mobile Phone Brand and Model?
If you insert Sim it shows Invalid Sim means it locked to some Network,You need to Unlock it,You can get the Unlock code from here Prounlocking.com Then you can use any GSM Sim in the Phone,it will not show "INVALID SIM"

Aug 27, 2011 | Cell Phones

1 Answer

When sim card is insert then see a invalid sim


If you insert Sim it shows Invalid Sim means it locked to some Network,You need to Unlock it,You can get the free unlocking instructions from here
Mobileunlockguide and get the Unlock code from here Superunlockcodes Then you can use any GSM Sim in the Phone,it will not show "INVALID SIM"

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At&t lg prime gs390 free unlock codes


Hi,
Please see below instructions in details on how to unlock code for LG phones, (i have included various model of LG for you to try)


Here are some unlock codes for AT&T LG phone available, menawhile , including the methods of entering the Unlock Code on your LG phones attached to them. Hope this is useful. AT&T cell phone Questions&Answetrs
Model : AT&T LG VU CU915 & CU920
1. Put a AT&T or Cingular SIM in the phone; it does not have to be an active SIM 2. Enter *#865625# then the 16 digit unlock code 3. Device should say: Network Lock Deactivated 4. Phone may automatically reboot and is now unlocked !
Model :AT&T LG C2000
Insert non-Cingular SIM card Power on the handset - phone will display "phone restricted" Select "Cancel" - phone will display "phone restriction code" Enter the SIM Unlock code. Select "OK" - the handset is now successfully unlocked
Model : LG TU720 - LG CU720 and all LG Shine SERIES
1) Power ON your phone with an accepted SIM card 2) Type *#865625#UNLOCK CODE 3) Press OK 4) Device is now unlocked
Model : LG CE110
1) Put a non AT&T or Cingular SIM in the phone; 2) The phone display: Invalid Smart Chip 3) Power on handset 4) Select "Cancel" - phone displays "phone restriction code" 5) Enter the unlock code (8 digit code*) 6) Select "OK'" - the handset is successfully unlocked
Model : LG CU400
1 - Insert non-Cingular SIM card" 2 - Power on the handset - Phone will display "Invalid SmartChip" 3 - Phone will display "Invalid SmartChip" 4 - Enter 159753#*# 5 - Enter the 8 digit SIM Unlock code 6 - Select "OK" 7 - The handset is now successfully unlocked
Model : LG CU500
1 - Insert non-Cingular SIM card" 2 - Power on the handset - Phone will display "Invalid SmartChip" (IF THE PHONE DOES NOT DISPLAY INVALID SMARTCHIP, PLEASE POWER OFF AND ON AGAIN) 3 - In Idle screen, enter 159753#*#. Phone will display "Enter NCK, Remaining 5 4 - Enter the 8 digit SIM Unlock code 5 - Select "OK" 6 - The handset is now successfully unlocked
How to Unlock LG CU515:
1-Insert non-Cingular SIM card" 2-Power on the handset - Phone will display "Invalid SmartChip". 3-Enter *#865625# then select option 1 and then again select 1 4-Enter the 16 digit SIM Unlock code 5-Device should say: Network Lock Deactivated 6-The handset is unlocked. 7-How to Enter Unlock Codes on CU575 (Trax) How to Enter Unlock Codes on LG F2250:
1-With allowed sim card in the start menu type: 2945#*3311#. 2-Handset shows saved, then return to startup screen 3-Press Menu key, choose Settings > Security > Sim Lock> Network > Deactivate, handset will now show 'Enter NCK' 4-Enter your unlock code and OK. How to Enter Unlock Codes on LG U8110:
1-With a not allowed sim card in your phone enter Pin code then validate, type: 277634#*# 2-Select 'Sim Unlock' menu # 3-Enter NCK code then validate 4-Your phone is now unlocked. How to Enter Unlock Codes on LG U8210:
1-With a not allowed sim card enter Pin code then validate, type: 277634#*# 2-Shows test menu 3-Choose sim test menu and type: 2945#*#, choose Sim Unlock menu 4-Handset shows 'Enter NCK' 5-Enter code, then hit OK. How to Enter Unlock Codes on LG U81xx:
1-To bring up the unlock menu on the phone with a SIM card, type 2945#*88110# 2-Enter the code 3-In case you need to reset the phone without a SIM card first, type 277634#*# or 47328545454#. If your cell phone is not listed, please follow instructions for LG C2000 above

If If instruction above does not help you i would strogly suggest to contact your Service Provider to provide some alternatives.


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lg-phones

Jun 03, 2011 | LG Cell Phones

1 Answer

Ihave spice mob no of 135790246811220 it is dual sim uim mob &supports gsm & cdma now it doesnot support gsm it shows invalid sim registeration failed


try and get a new gsm sim and see if you get the same problem. Let me know of the outcome.
Good luck

Jul 05, 2010 | Cell Phones

4 Answers

Dual sim china mobile show on screen invalid sim


I HAVE A CHINA SET SIGMATEL S90 DUAL SIM ONLY SIM 1 IS WORKING FOR SIM 2 SHOWS AS INVALID SIM FROM FEW DAYS PLEASE SOLVE THIS PROBLEM

BABU
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If your phone show Invalid SIM it means the SIM card is corrupted you will have to change the SIM card.There is no other option.

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Dear Sir,


Dear Sir's
I purchased mobile dual SIM China Sigmated FXD T99i. But 2nd SIM not activated and show Invalid sim on desktop since Decembir-2009
Kind Pl. help me & guide. My mobile No is 9535907858

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