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"Invalid sim" means that your phone is locked to particular Network.To solve this problem,you need to unlock your phone.You can unlock your Samsung SGH-A177 phone from Network lock using unlock code.Unlock code is the best and safest way to unlock phone. You
can get the unlock code for your phone from your Network service provider or
any third party online vendors like MobileUnlockSolutions.com here you need to specify your country, Network
name to which it is locked, IMEI number of your phone. Then they deliver unlock
code to you through mail with unlocking instructions. By using this you can
unlock your phone easily.
If you travel a lot, you then would need to unlock your phone by using unlock codes. This also would permanently unlock your phone from other networks worldwide so once your phone is unlocked, you just have to simply swap your SIM or use a different SIM, this way you could save on roaming charges. Just purchase from a BLACKBERRY UNLOCK CODE provider the AT&T BLACKBERRY Curve 8300 unlock code. No worries on the codes, they'r are safe and accurate.
With that error note, you need to unlock your Phone. It just simply mean that your Blackberry is still operator locked, and would just accept its original operator sim.
There are several ways to unlock your phone.
Unlock by operator- where you will ask for unlock code FROM the original operator where the phone is locked to.
Unlock by codes where you will buy unlock codes from sites.Have a search on Google for unlock codes for Blackberry, I cant mention examples, I dont want to be endorsing sites.
Lastly professional Unlocking which is performed by technician using special gadgets and softwares.
Hope This helps.
ur defalt phones codes is 12345 or 00000 u can use it Default 4 Digit user code: 1234 or 0000 Default 6 Digit Security code: 123456 or 000000
type *#06# on your phone to get it.
OR: you need unlock code to unlock your phone...........
dont worry you can get unlock code ......... fromthird party......... and bysearching in google, and read several forums and i foundthis provider who provide remote unlock codes, the pre sales was excellent evenafter the purchase there customer support was a+, you can Get code fromhere................Click Here
When you place a new or a existing SIM card from another phone provider into your mobile phone and it asks for a Security code then :- This phone is locked to the original mobile phone provider. You need to contact this mobile provider to ask for the unlock code (security code) for this phone. You need to provide proof of ownership etc and the phone's unique IMEI number which is located inside the phone under the battery. They use this number to generate the unlock code for your phone. They should provide you with instructions on how to enter this code into the phone. Once you unlock the phone, then you can insert a new SIM card in this phone or sign up with another phone provider using this phone. You could ring the phone provider and ask for the unlock security code because you are going overseas and wish to use your phone with a prepaid SIM card from another country. This maybe a free service. The other way to get your phone unlock is to use a phone unlocking company on the Internet, they usually charge a couple of Dollars for their services.Use Google and search for "Security unlocking code” in your area. You can also try this WEB site. www.unlock-free.com/nokia-master
I understand that you need an unlock code for your LG KU990 Viewty Phone.
1. insert original sim card and turn phone on.
2. Press telephone icon at bottom of screen to bring up the phone keypad
3. Enter 2945#*990#
4. A menu will pop up, select sim unlock
5. Enter your unlock code and press ok6. The phone will then reboot and the unlock is complete.
no it just unlocks it from you putting a wrong passcode in you need to take it to a local phone repair centre i was charged £10 the phone was £30 cheaper on a different network so i saved £20 but not all phones will work on all networks (im led to believe) hope it helps ej