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SIM test is a test performed to test for sulfur reduction, Indole production and motility. Black color formed= positive for sulfur reduction Red color after adding Kovacs reag â¦ ent= positive for Indole production Microorgaism growth all over the tube= motile.
The SIM card is a memory circuit in your cell phone that carries necessary information back and forth to your network, and it also contains some of your personal data. While the information that your service provider needs is not changeable or removable, you can control some aspects of your personal information.ne way you can protect your SIM card in case of loss or theft is to contact your service provider and ask them to lock the SIM card. This simple step prevents anyone from reading your SIM card or using it in another phone. Keep in mind that this step does not lock your phone.