!!! Overview
[{$pagename}] (CELL ID or [CID]) is a generally unique number used to identify each [Base Transceiver Station] ([BTS]) or sector of a BTS within a [location Area Code] ([LAC]) if not within a [GSM] [network].

In some cases the first or last digit of CID represents cells' Sector ID:
* value 0 is used for omnidirectional antenna,
* values 1, 2, 3 are used to identify sectors of trisector or bisector antennas.

In [UMTS], there is a distinction between [{$pagename}] (CID) and [UTRAN] Cell ID (also called LCID). The UTRAN Cell ID (LCID) is a concatenation of the [RNC-ID] (12 bits, ID of the [Radio Network Controller]) and Cell ID (16 bits, unique ID of the Cell). CID is just the Cell ID. The concatenation of both will still be unique but can be confusing in some [{$pagename}] [databases] as some store the [CID] and other store [LCID]. It makes sense to record them separately as the [RNC ID] is the same for many cells, the unique element is the CID

A valid [CID] ranges from 0 to 65535 (216 − 1) on [GSM] and [CDMA] networks and from 0 to 268435455 (228 − 1) on [UMTS] and [LTE] networks.

!! More Information
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