Case status inquiry

Which office should I call, the service center or the local field office, for the case status? Which one gives quicker response and more detail information? If I called 800 number, how long can I make another call if no response? Thanks.

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local office: infopass.uscis.gov -ITWorker0214- 给 ITWorker0214 发送悄悄话 (0 bytes) () 01/19/2007 postreply 18:51:25

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