why on my blackberry flip it says invalid sim card?

[DavidBrautman]

i just got one of my friends blackberry flip. its a diffrent service. when i put in my sim card on the very top it said invalid sim card.

 

[DianDaniel]

It's because it's locked to the carrier...

Try to unlock your blackberry...

 

[jocoolguy]

i just got one of my friends blackberry flip. its a diffrent service. when i put in my sim card on the very top it said invalid sim card.

If your Blackberry Flip Phone displays invalid sim message on the screen,it's locked to network,you have to unlock it to use your sim card.You can use only gsm network sim after unlock it.You can get the code from the site Unlocking4u.com/blackberry/rs6wp8/ and unlock it easily.
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