Really hated the laggy thing on the S3, tried the S4 and it was still there a little even with the extra power and specs, lost faith in the GS series, bought a Nexus 5! I'll miss the camera though......
You don't need BIS to use the Z10. I set up my cousins Z10 the other day entirely over wifi, you can use your existing data plan on it doesn't have to be BBRY
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