SIDH: System IDentification for Home System
The SIDH (System IDentification for Home System) in your cellular telephone tells the cellular system what cellular carrier your cellular service originates from. This is used in roaming (making cellular calls when in an area not served by your cellular provider).
Every geographical region has two SIDH (System IDentification for Home System) codes, one for the wireline carrier and one for the nonwireline carrier. These are the two companies that are legally allowed to provide cellular telephone service in that region. The wireline carrier is usually your local telephone company, while the nonwireline carrier will be another company. The SIDH for the wireline carrier is always an even number, while the SIDH for the nonwireline carrier is always an odd number. The wireline carrier is also known as the Side-B carrier and the non-wireline carrier is also known as the Side-A carrier.
SIDH is often abbreviated to SID.
A list of SIDH’s can be found at http://people.ku.edu/~cinema/wireless/Cellular_SIDs.html.
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- Tumbling
Tumbling exploits a weakness in the AMPS/NAMPS roaming system. In tumbling, you first configure the SIDH in your mobile telephone to pretend to be from another cellular carrier. If you are in Colorado, for example, you would configure your mobile telephone as if it were subscribed to a cellular carrier in Texas. Next, you modify [...]...
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The MIN (Mobile Identification Number) is a number that uniquely identifies a mobile telephone subscriber. MINs are 34-bits in length. The first 10 bits are sometimes known as MIN2, while the last 24 bits are referred to as MIN1. Together they are simply known as the MIN. In the United States, the MIN is derived [...]...
- NAM: Number Assignment Module
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- SCM: Station Class Mark
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