Need to unlock SIM card - ZTE Cell Phones

Call your cellphone service provider.

Do you want to insert other network sim or if your Blackberry Curve 8350I displaying insert sim card,if already sim card inserted.Don't worry i will help you.You can insert other network sim card in the phone by unlocking the phone from current network lock.To unlock Blackberry Curve 8350I use unlock code.Visit the site Wickedunlock.com get unlock code and unlock it easily.Then insert any GSM network sim card.If the phone displays insert sim card even though sim card is already in the phone.Please remove the sim card and replace it correctly.It is because the phone didn't detect the sim correctly.After inserting if it is display invalid sim or sim not valid message on the screen.It is locked to some network,you need to unlock it.To unlock use unlock code.Get code from online site and unlock it.

Did you mean your Samsung S8000 Jet phone displaying invalid Sim card?You need to unlock it from current network lock,to use other network sim card.Visit the site Mobileunlocksolutions.com get unlock code and unlock it easily.Then use with any GSM network sim card.Check whether unlock code is available for your network and country.If it is available get it and unlock it.You can unlock only GSM network locked phone.You cannot unlock CDMA network locked phone.After unlock your phone you can use any GSM network sim card in it.You cannot use any CDMA network sim card in it.

Nokia Lumia 920 has a SIM tray on the top of it. You need a needle or a clip to open it.


If you need to put in a different SIM card in the device you should first make sure it is unlocked to the network provider. SIM unlocking will enable you to use your device with other SIM cards from other carriers. To Unlock Nokia Lumia 920 you need an unlock code. Follow the Link to know more about Nokia Unlocking.

If the Sim card Not support means it may locked to network.You need to unlock it...You can get the network unlock code from the site Onlinegsmunlock.com/samsung/rs7wp8/ for SAMSUNG GSM Network locked Phones and unlock it from Network lock.You need to specify the Model?
ALSO check whether it not support only one Sim card,if that problem means it may CDMA Network,OR may Sim card problem.If it not support other Sim card and support only one Sim means it's Under Network lock,You need to find the network,country it locked now and unlock it using the Unlock code,Only GSM Network lock Phones can be unlocked,CDMA network locked Phones cannot be Unlocked from the Mobile Phone.

While you inserting the Sim card it says invalid Sim card means it locked to Network,you need to unlock it,You can get the Unlock code here Superunlockcodes and Unlock it,then you can use with any GSM Network Sim card......

If is a AT&T sim card. and you locked it. You will need a new sim card.Also any other carrier sim card you will also need a new sim card. That sim card that you locked is burn already and can't be use no more. You can get a new sim card for $5 bucks or free from your carrier.

contact the service Provider........