Support New to S3, couple questions

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http://androidforums.com – Just made the switch from iPhone... had my s3 a couple days now and have a few questions 1: is it supposed to charge this slowly?? My iPhone charged probably 3-4 times faster. It takes about a half hour for 10% to charge... 2: my phone synced my contacts with Microsoft exchange server (whatever that is) and now I have a bunch of contacts with no numbers etc, how do I unsync contacts from Microsoft exchange? (General)