General solutions to insert LG unlock codes for most phones
1.On most phones, especially the new ones should ask for unlock code if you restart with a sim from another carrier. So just find a sim from another GSM network, that you know should normally be supported by the phone if unlocked, and when will turn on with that sim inside will ask for the “Network unlock code”, or something similar. Be careful not to be confused if will ask for “PIN code”, as that is the Pin security from the sim card not, the unlock code.
2. If the above method has not worked can try the code that works for most Lg phones to get to the secret menu: “2945#*XXX#” , where xxx represents the number of your phone.For example, if you have P920 the code will be 2945#*920# , for LG Cookie Lite T300 is 2945#*300#, and so on. After dialing that code , depending on the phone you will either get a box to insert the code or get to a menu from where will have to select “Sim Unlock Code” or “Network unlock” (or something similar) and will be able to insert your unlock code. For some models the menu is even a bit more complicated, so in order to get to the place for inserting the code have to go to Menu->Settings->Security->Sim Unlock Code. If your phone has a service provider lock (SPCK) , like Telus or Fido Canada will have to insert beside the network unlock code (NCK), the service provider code(SPCK) also in the same way.
LG troubleshooting instructions:
Your LG phone displays “Code Error” or “Sim Network Unlock Unsuccessful” after inserting the unlock code
Never enter more than once the LG unlock code,if you know you wrote it correctly but was not accepted.
If the code is not accepted do a factory reset and try to reinsert it.If you have a custom firmware that might be the cause why is not accepted so should restore to stock firmware and try again.
The LG device asks for “Sim PIN” or “PUK”
Those are coded specific to your SIM card and should be written on your SIM package if is a new SIM.The SIM pin is either set by the Sim owner or if is a new card should be written on the SIM instructions papers. For most Sim cards the default PIN is either 0000 or 1234 ,but you only have 3 tries so would recommend to try finding the exact Pin before trying those.If asks for PUK you can find it by calling to your carrier support or look on the original SIM package.
Your LG asks for “Phone Password”/”Security Pin”/”User code” or another user lock like pattern lock/Gmail account
Most likely your LG has a user lock. To be sure that’s the problem turn on the phone without a SIM inside or with the original SIM. If asks the same thing then for sure the user lock is the problem. The fix for this is a hardreset. To do a hard reset on android phones go in “Recovery mode” by turning the phone off then holding in the same time “Home”, “Power” and “Vol up” buttons, then select “Wipe data/Factory reset”
After turning on your LG smartphone with the new sim inside it displays “No SIM”
It means the LG mobile cannot detect the sim card at all.The most usual reason is that the SIM card is not inserted correctly, so verify what’s the right way to insert the SIM card and reinsert it.If you still you get the same message there may be a problem with your SIM card, either SIM is broken or not supported by the phone at all, so verify if you get the same message with other SIM card or there might be a problem with the sim card reader.
The LG phone accepted the code but still displays “No service”
This can be caused by many things, here are the most common reasons :
-The SIM card is not registered, not activated or not supported by the LG mobile phone. So should either try with other SIM, or should verify to see if this SIM works in another phone to exclude this possible issue
-Your phone can be blacklisted because was declared lost/stolen or for not played contract. To verify if that’s the problem try with the original sim to see if works or contact the network help service. If the phone works fine with the original SIM than this is not the problem
-A settings or firmware problem. Can fix that by selecting the network manually, doing a factory reset, update or firmware restore
-The phone has a hardware problem. If any of the above fixes do not work your phone may have a hardware problem and should send it for repairs, hopefully using the warranty if still available