carrier unlocked and factory unlocked in Amazon and EBay

carrier unlocked and factory unlocked in Amazon and EBay

(1) factory unlocked 指你直接从苹果购买的设备,没有网络锁,只要制式一样,可以使用任何运营商,通常也需要全价购买。

(2) 而 carrier unlocked 狭义是指你跟营运商购买的合约机(通常两年合约)然后另外付费才解锁的设备。

两种你拿到手之后都可以直接用,恢复系统之后一样需要连接网络(苹果的服务器)激活。

carrier是运营商解锁,factory是厂商解锁

美国的「unlocked phone」和中国的「无锁机」的概念不太一样。中国的无锁机概念一般是指没有被运营商资费套餐绑定,可以用所有运营商的SIM卡的手机。而美国iPhone的unlocked phone是指所有信号频段都能接收的手机。

其次,现在美国的iPhone 6和6+卖的只有AT&T, Verizon, T-Mobile 和 Sprint这四家公司的定制手机。但是,AT&T和Verizon的定制机要求必须用Verizon的SIM卡和套餐,而Sprint的定制机虽不要求必须用Sprint的SIM卡,但是有大意是「若不在购机45天内激活手机内的Sprint SIM卡,Sprint有权锁定手机」的条款;T-Mobile的手机虽然也是定制机,但是既不要求必须使用T-Mobile的SIM卡,也没有其他约束性条款,但是要注意的是,据传只有 Apple Store卖的T-Mobile定制机没有SIM限制,T-Mobile营业厅或者网站卖的定制机仍必须使用T-Mobile自家的SIM卡。

回到题主说的全网通,目前美国卖的iPhone 6和6+中,只有Sprint的定制机同时支持LTE FDD和LTE TDD的4G网络,其他三家的定制机只支持LTE FDD网络。但在3G频段,Sprint同时支持三种制式,Verizon仅支持CDMA,其他两家都只支持WCDMA,而2G网络没有区别,均是GSM。

所谓全网通,是说Sprint的定制机在4G频段同时支持中国移动的LTE TDD网络和中国联通与中国电信的LTE FDD网络,而在3G频段,Sprint同时支持中国三大运营商的3G制式,所以叫做「全网通」。而其他三家的iPhone 6和6+,AT&T和Verizon要求用自家SIM卡,在国内无法使用,但是T-Mobile在国内完美支持中国联通的网络。

无锁版,有锁版只能用2g,无锁版3g.
Amazon官方:

What is an unlocked phone?

An unlocked phone is a device that is not bound to any carrier or plan. It allows you to choose your phone first and your carrier second. Upon selecting a plan, simply insert the carrier’s SIM card into the phone and you’re ready to go. If you decide you want to change carriers down the road or want to take an international trip, it’s as simple as replacing your existing SIM card with a new SIM and activating your new plan.

What are the benefits of an unlocked phone?

Freedom: Choose the carrier with the best service or price. If you find a better deal later, you have the ability to change to a different carrier.

Travel: Take your phone internationally and use the carrier of your choice. It’s as easy as inserting an active SIM card.

Selection: Choose the phone with the features you want, whether or not your carrier sells it, and get more service options without a contract.

How do I set up my unlocked phone?

The first thing you’ll need is a SIM card for your desired carrier. When activated, the SIM card will let your phone connect to your carrier’s network. If you decide to upgrade to a newer unlocked phone in the future, you can easily remove the SIM card from your old phone and put it in your new phone—just make sure you get the right size of SIM card (nano, micro, or standard) for your phone. If you want to use your phone while traveling internationally, you can easily buy a SIM card for a carrier that operates where you’re traveling. As long as it’s activated, you can just swap SIM cards when you arrive at your destination.


1、全球移动通信系统Global System for Mobile Communication就是众所周知的GSM。
2、CDMA是一种调制解调技术,码分多址。
3、TD-CDMA是一种调制解调技术,时分码分多址。
4、2g(generation)……分别表示第一代、第二代……通信系统。
5、LTE(long term evolution)长期演进过程,原本定义用来表示3G-4G的过渡时期。
——以上都是一些基础的通信名词,表示一些通信关键技术、发展历程,是通信中的软知识。这些理论、协议往往经过科研探索、公司发展、国际标准机构认证,变成标准协议被业界统一采用。
——天线以及硬件是这些技术的承载,就像电脑硬件承载软件才能发挥作用一样,这些技术也只有变成硬件电路、天线、通信软件,才能发挥作用。
GSM手机使用GSM制式的手机。目前,手机制式主要包括GSM、CDMA、3G三种,手机自问世至今,经历了第一代模拟制式手机(1G) 、第二代GSM、TDMA等数字手机(2G)、第2.5代移动通信技术CDMA和第三代移动通信技术3G。
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3 thoughts on “carrier unlocked and factory unlocked in Amazon and EBay

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