台灣之星5G..(更：已放棄，換手機比較快）

pettter wrote:
昨天剛原約改5G 如果台星不幫我解鎖....不知道能不能改回來.....

星空殘月 wrote:
我才剛換手機，過幾天就收到4G升5G的試用通知簡訊

還告知偵測到設備能用5G，那不就是他們能知道我用啥手機型號還能用5G嗎?

phonex88 wrote:
手機的imei碼，相當手機身份証。

全球每部通過正規渠道銷售的GSM手機均有唯一的IMEI碼。 IMEI碼由GSMA協會統一規劃，並授權各地區組織進行分配，台灣市場販售的手機由ncc負責入網認證。

1、TAC，TypeAllocation Code，類型分配碼，由8位數字組成（早期是6位），是區分手機品牌和型號的編碼，該代碼由GSMA及其授權機構分配。

注：TAC碼前兩位又是分配機構標識（Reporting Body Identifier），是授權IMEI碼分配機構的代碼，如01為美國CTIA，35為英國BABT，86為中國TAF。

2、FAC，Final Assembly Code，最終裝配地代碼，由2位數字構成，僅在早期TAC碼為6位的手機中存在，所以TAC和FAC碼合計一共8位數字。 FAC碼用於生產商內部區分生產地代碼。

3、SNR，Serial Number，序列號，由第9位開始的6位數字組成，區分每部手機的生產序列號。

4、CD，Check Digit，驗證碼，由前14位數字通過Luhn算法計算得出。

5、SVN，Software Version Number，軟件版本號，區分同型號手機出廠時使用的不同軟體版本，僅在部分品牌的部分機型中存在。

一般來說，由IMEI碼中的TAC部分就可以得出手機的型號，但也有個別品牌不同型號的手機共用一個TAC碼。同時，由於一個TAC最多只能對應6位數字序列號，蘋果iPhone等熱門機型有多個TAC號段。當然，有些手機會有兩組 IMEI 碼，這通常是因為它有兩個 SIM 卡插槽的原因。

GSMA Device Database
Direct access to the TAC Data you need for device validation, device analytics, network optimisation and more.
With over 10,000 device models launched every year, keeping track of accurate TAC (Type Allocation Code) and IMEI (International Mobile Equipment Identifier) is highly complex. GSMA Device Database lets you identify the manufacturer and model, as well as other characteristics of a mobile device from its TAC / IMEI number.

GSMA issue the TAC used to identify device types, which all devices require. Then the device manufacturer adds a further 7 digits to produce the IMEI (identifying the unique device, not just the type). During this process, we collect data from all device manufacturers, which is collated to create Device Database. Significantly, this is updated by manufacturers in real-time, so the data is always accurate.

GSMA Device Database can be used across many business applications.

For example:
● Identifying the type of device in use by its TAC or IMEI, to offer appropriate services or customer offers
● Help in remote management of devices for software and configuration
● Clarifying network resource usage by device
● Identifying operating systems
● Ensuring devices are legitimately registered by the true manufacturer

星空殘月 wrote:
我也合理懷疑台星有5G(恕刪)

phonex88 wrote:
電信商知道的，比你想(恕刪)