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Not able to access the service menu on my Galaxy S3

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I have a Samsung Galaxy S3 from *US Cellular* and I'm trying to use it on a different carrier. I added the new SIM Card and I tried all the possible options to access the service menu and it always says ***"Mobile network not available"***. My phone model is SCH-R530U. Thanks.
Asked by Farqad (1 rep)
Jan 5, 2014, 11:54 PM
Last activity: Feb 15, 2021, 10:03 PM