Three 卡插上能上网却打不了电话？先查手机支不支持 4G Calling

Three 官方写得很直接：没有 2G、3G 已关闭；4G 手机如果不支持 4G Calling，能发短信、能用数据，但打不了电话。所以插卡前，先查你的具体机型。

这篇回答：Three 的 Pay As You Go 卡已经到手，或已经决定用 eSIM 之后，怎么把它真正开通并用起来。选卡阶段的内容（产品线区别、付款方式、自动续费、中国大陆漫游、保号规则、客服入口）见同品牌选卡指南。

月费、GB 档位、Data Pack 价格、通话短信流量单价和促销价都不写入正文，请以官方当前页面与当期 Price Guide 为准。

本文范围限定 Pay As You Go，不覆盖 Pay Monthly 合约。资料查看日期：2026-09-29，前六节内容于 2026-10-04 复核，另有部分页面于 2026-10-03 复核。

最重要的一点先说：Three 官方自己在四个不同位置对激活给出了四种不同表述。按最严格的那个（条款原文）走才一定安全，也就是插卡时人在英国并完成一次充值或买一个 Add-on。四段原文见下文的激活定义一节。

手机支持 4G 或 5G，打电话还要支持 4G Calling。条款 Quick Summary 原文：Three has been closing its 3G network in stages and from 2025 we will no longer provide a 3G service. All of our customers will need a 4G or 5G handset capable of making voice calls on the 4G network, or a 4G or 5G data device or router to access the Three Services. 3G-only devices, and early 4G handsets that can only make 3G voice calls, will no longer work on the Three Network。[S1]

没有 2G 可以兜底。官方网络支持页 FAQ 原文：No, we don't have a 2G network。同页另一处：If you're using a 3G only device, you won't be able to use our services. And if you're using a 4G device without 4G Calling, you'll be able to text and use data, but calls won't work。[S2]

由于语音只能跑在 4G 上，插卡前先在官方 Device Support 选到自己的具体机型，查看 4G Calling 是否支持以及如何开启。[S10]

检查手机是否锁网。官方 Device Unlocking 页写 2014-01-01 之后从 Three 买的设备已解锁；官方 Setting up your phone and SIM 页写从别的网络买的手机 may need to be unlocked to work with a Three SIM。这是可能需要，不是所有外购手机都必须再解锁。[S4][S11]

双卡机要把 Three 卡放第一个卡槽。官方原文：you'll need to set your Three SIM as the primary SIM. A secondary SIM will only work on 2G, which isn't supported by the Three network；同页另一条：You'll need to use a SIM from another network for the secondary SIM. If you use a Three SIM, you'll see a No Service notice。[S12]

官方资料没有说明：各机型和各原运营商的具体解锁手续，以及买 PAYG SIM 是否需要身份证件、护照或签证信息。本轮查阅的 PAYG 落地页、PAYG support 和 Welcome to Pay As You Go 三页都没有提到下单需要任何证件，但这不等于官方确认不需要。请联系 Three 官方客服确认。

先说一条官方原文：Three 已经不提供单独订一张免费 PAYG SIM 的选项。官方 FAQ 写 You can't order a free Pay As You Go SIM on its own. When you order a Pay As You Go SIM, you'll need to choose and pay for a Data Pack to go with it. The SIM itself is technically free, and included in the cost of the Data Pack, but it can't be ordered separately。[S6]

官网下单实体卡：拿到的是一张 Trio SIM，官方原文 There are 3 SIM sizes available: Standard, Micro, and Nano. We send out a Trio SIM giving you the choice of all 3 sizes – just press out the one you need。[S13]

官网下单 eSIM：官方 PAYG 落地页写 if you have an eSIM, you can start using your data today，另一处写 There's no waiting with eSIM – we'll email you everything you need, so you can start using it right away。拿到的是两封分开的邮件，一封二维码、一封确认码，详见下文的 eSIM 一节。[S6]

零售店充值券只给已有 Three PAYG 号码充值，不能代替 SIM，也不会给你一个新号码。刚落地还没有 Three 卡的人，先解决实体卡或 eSIM 的获取与激活。

官方资料没有说明：PAYG 实体卡的确定到货日期。官方配送页只写 We send our SIMs using our 2-day delivery service. You can pick your delivery date when you order，这是配送服务说明，不是每笔订单的到货承诺，也没有单独说明 PAYG 是否有例外。必须在落地当天联网的人，不要把这一条当成确定到货日期，下单时以实际可选日期为准。[S14]

官方资料没有说明：零售店充值券的合作商家名单。官方只写 loads of retailers 和 a participating retailer，没有点名任何商家，也没有门店查询入口。购券前请向店员确认可买 Three PAYG 充值券以及可用的付款方式。[S6]

另有一点官方术语上的不一致：Three 的支持页面通篇用 Data Pack，而当前生效的条款 PDF 里完全没有出现 Data Pack 这个词，条款改用 Package、Pay As You Go Voucher、Add-on 三个词。官方资料没有说明这两套词的对应关系，请以你所在页面当时的用词为准。[S1][S6]

官方有两套并行的开始使用说明，颗粒度不同。本节把两套都列出。

最详细的一套（Activating your Pay As You Go SIM）共五步：第一步确认手机电池已充满，官方原文 Check that you've fully charged your phone's battery；第二步插卡并开机；第三步等 Three 发来第一条短信告知已开始激活，官方要求 Make sure you keep your phone switched on while we connect you to the Three network；第四步等第二条短信，要求你关机再开机，原文 we'll send you another text asking you to turn your phone off and on again；第五步等第三条确认短信，原文 Your SIM will now be activated, but we'll send you another text just to confirm。[S3]

也就是说这套流程里有三条短信和一次强制重启。如果你插卡后收到英文短信让你重启，那是正常流程，不是故障。[S3]

面向新用户的简版（Welcome to Pay As You Go）共三步：插卡，官方写 We'll send you a text with your number and some other important details，用 eSIM 的人这一步改去官方 eSIM 支持页；下载 Three app，官方把装 App 列为开通流程的正式一步，用来管账户、看余量、充值；买 Data Pack 或充值，官方写 You'll need a Data Pack or Top-up to start using your SIM，若买卡时已预装则 it'll be ready to use straight away。[S4]

等待时长：两份官方实体卡帮助页讲的是同样的三短信加重启流程，却给出不同的预计时长，一页写约 2 小时，另一页写约 30 分钟，都说繁忙时可能更久。官方资料没有说明这两个数字各自的适用边界，本文不把任一数字写成统一承诺。[S3][S11]

转网的人还有一条硬截止线。官方 Before you begin 页写 you'll need to activate your SIM from Three before your number can be transferred，以及 The SIM must be activated by 17:00 on the last working day before your transfer takes place。[S8]

这四段全部是官方原文，出处不同，口径不一致，本文原样列出不做取舍。

一、当前生效的 PAYG 条款（effective 21 May 2026）术语表：Activate Your SIM: means inserting your SIM into a Device while in the UK, and either topping up with Pay As You Go Credit or purchasing an Add-on。按这个定义，插卡（且人在英国）和充值或买 Add-on 两件事都要做。[S1]

二、Pay As You Go Data Packs 页 FAQ：When you receive your Pay As You Go SIM, insert it in your phone, and you'll receive a text message telling you your SIM is ready to use… The SIM is automatically activated as soon as you make a call, send a text, or use your data。按这个定义，插卡加实际用一次就自动激活。[S6]

三、Before you begin（转网前置页）：To activate your new SIM, simply put it into your device and switch it on. Once you see signal bars, it's been activated. You might need to switch off Wi-Fi to see the signal bars。按这个定义，插卡开机看到信号格就算激活。[S8]

四、SIM Support（替换卡场景）：Your new SIM will be active and ready to use straight away. All you need to do is put it into your device. It'll connect to our network automatically – when you see signal bars, you're ready to go。[S7]

官方资料没有说明：这四个定义各自的适用边界，也没有任何一页说明新用户首次开通与老用户换卡在激活口径上的区别。定义三和四出现在转网前置和替换卡两个特定场景页上，定义一来自条款。

按最严格的定义一操作可以同时满足另外三个，反过来不成立：插卡时人在英国，并完成一次充值或买一个 Add-on。另外官方也写明 You'll need a Data Pack or Top-up to start using your SIM，不充值实际用不了。[S1][S4]

是，而且这一条直接写进了条款的定义本身。两处官方原文都来自当前生效的条款：术语表的 Activate Your SIM: means inserting your SIM into a Device while in the UK, and either topping up with Pay As You Go Credit or purchasing an Add-on；以及第 6.15 条 If you use Three Services in one of our Go Roam destinations you must first Activate your SIM in the UK。[S1]

支持页面也有两处呼应。Activating your Pay As You Go SIM 页写 To use your Pay As You Go SIM abroad, you must first top up or add a Data Pack to your account. You must do this while you're in the UK – if not, you won't be able to use your services。PAYG 落地页 FAQ 写 if you've activated your Pay As You Go SIM in the UK before you head abroad, you can use your normal allowance in any of our Go Roam destinations at no extra cost… And activating your SIM is easy. Just make a call, send a text or use your data in the UK before you travel。[S3][S6]

可操作结论：落地英国之后再插卡开通，别在出发前或转机时试。注意支持页那两段强调的是想出国漫游的话充值和激活要在英国做完，而条款的术语表把人在英国直接写进了激活的定义里，条款的口径更严格。

官方资料没有说明：在英国境外插卡会具体发生什么（会被拒绝、会失败，还是只是不受保障），也没有任何一页说明已经在境外插了卡的人回到英国后要怎么处理。请联系 Three 官方客服确认。

硬条件：手机支持 eSIM（官方查询入口是 Device Support，选具体机型查看）；安装期间必须连 Wi-Fi，官方所有 eSIM 步骤的第一或第二步都是打开 Wi-Fi；上文第二节的通用条件（4G 或 5G 加 4G Calling、已解锁）同样适用。[S5][S10]

最关键的一句官方原文：Important: Your QR code and confirmation code will be sent in separate emails and can only be used once. If you don't get your email with either code and it's not in your junk or spam mail folder, please contact us。两封邮件、两个码、各自只能用一次，收不到就先翻垃圾邮件箱，再找客服。[S5]

扫码安装路径（适用于不支持免码激活的 eSIM 机型）：官方原文 If your device has an eSIM but doesn't use seamless eSIM activation – don't worry. To activate it, scan the QR code we emailed to you and enter the confirmation code。官方给的 Samsung 路径是：打开 Wi-Fi；进入设置选 Connections；选 SIM Card Manager 点 Add Mobile Plan；选 Scan Carrier QR code 扫描邮件里的二维码；然后输入另一封邮件里的确认码。[S5]

免码路径（Seamless eSIM activation）：官方原文 Seamless eSIM activation is available on iPhone and the following Android devices，当日列出 Google Pixel 10 与 Pixel 11 系列、Samsung S25 系列、Motorola Edge 70、Razr 60、Razr 70 Ultra、HONOR Magic8 Pro、Magic V5、600 Pro、Magic8 Lite，并写 will be available on more devices soon。这条路径官方写 No – seamless eSIM activation means there's no need for QR or confirmation codes，步骤只有三步：开机、打开 Wi-Fi、按屏幕提示操作；屏幕上没出现步骤时官方写 make sure your device is connected to Wi-Fi and try again。[S15]

官方资料没有说明：Seamless eSIM activation 页开头写的是 If you've bought a new device, like an iPhone or Google Pixel 11 from us，非 Three 购买的同型号手机是否同样适用官方未明说。机型清单以官方页面当时的内容为准。[S15]

生效时间：两条路径官方都写立即生效，某些情况最长可达 7 小时。[S5]

已经在 Three 但想把实体卡换成 eSIM：官方给的是设备端自助转换，原文 Already with us and have an eSIM-compatible phone? You can change your physical SIM to an eSIM in your device settings。iPhone 的官方步骤是 Settings → Mobile Service → Convert to eSIM，确认后等待激活、双击侧边按钮确认、取出实体卡、重启。Android 的官方步骤是先给设备设密码、连 Wi-Fi，然后 Settings → Network & Internet → SIMs，选中要转换的实体卡，选 Convert to eSIM，按屏幕步骤走，eSIM 激活后即可取出实体卡。PAYG 用户申请替换 eSIM 的入口是 My3 → Plan → Get a replacement SIM，或 Three app 首页 → Manage SIM → Replace SIM。[S5]

替换 eSIM 的官方等待期：You may need to wait before ordering a replacement eSIM if: You've registered a new account or changed your credit limit, please wait 7 days. You've updated your email address, please wait 2 days。急需时官方给的绕行是到 Three 门店办，但必须带有效带照片证件，官方接受的清单是 Valid and current UK or international driving licence（photocard only）、UK and international passports、European ID card。[S5]

官方资料没有说明：新注册账户等 7 天这一条会不会卡住 PAYG 新用户的首次 eSIM 开通。这段等待期原文出现在 replacement eSIM 小节下，而首次开通写在 How to activate your eSIM 小节，该小节开头写 If you're new to Three or have taken out a new line with us, you can activate your eSIM right away，但官方没有在同一处明确说 7 天等待期不适用于首次开通。这一条对落地当天就想用 eSIM 上网的人影响很大，请提前联系 Three 官方客服确认。[S5][S15]

官方资料没有说明：PAYG 新用户下单 eSIM 后，二维码邮件多久会到。官方只有 right away 和 today 这类定性说法，没有分钟或小时级的承诺。[S5][S6]

官方的立场是手填 APN 不是开通步骤，而是排查手段。在官方页面上，APN 出现在网络支持页的 Internet issue 排查步骤里。官方原文：Check the Access Point Names (APN) in your settings and try resetting your network settings. Remember, this will restore all network settings – including Wi-Fi networks and passwords, cellular settings, APNs, and VPNs – to factory settings。[S2]

注意官方的提示：重置网络设置会影响 Wi-Fi 网络与密码、蜂窝设置、APN 和 VPN。操作前确认自己能重新配置这些内容。[S2]

具体数值在逐机型指引里，而不是主站。官方原文指路：For more help, go to device support, pick your device then go to How to guides. You can find the APN details by going to Check your internet settings。[S2]

本轮在 iPhone 17 与 Samsung Galaxy S24 两个机型的官方指引上逐项核对一致的字段是：Name 为 3；APN 为 three.co.uk；Username 和 Password 官方标注留空；MMSC 为 https://mms.um.three.co.uk:10021/mmsc；MMS proxy 为 mms.three.co.uk；MMS port 为 8799；APN Type 为 internet + mms。这只证明这两个机型的指引相同，不代表所有机型都相同。[S10]

官方在同一处附了一句提醒：Note: The input fields may allow you to enter more characters than listed in the configuration details, ensure no additional characters or spaces have been added。[S10]

iPhone 17 的官方操作路径是 Settings → Mobile Service → Mobile Data Network，填入上述参数后点返回。Galaxy S24 的官方路径是从主屏幕下滑打开设置 → Connections → Mobile networks → Access Point Names → 添加图标，填入字段后从菜单图标选 Save。其他 Android 机型的菜单或参数可能不同，先选自己的机型查看官方指引。[S10]

漫游时：iPhone 17 的官方漫游 APN 指引要求出国漫游时设置一个新 APN，但列出的字段与该机型普通 APN 指引逐项相同，末尾又写 When you return to the UK you'll need to restore your UK settings。不要仅凭漫游标题猜一套不同数值，也不要把一个机型的结果推成所有机型、所有目的地的规则；出行前按自己机型的官方页面核对。[S10]

等官方短信：插卡后 Three 会主动发，官方原文 We'll send you a text with your number and some other important details。[S4]

iOS：Settings → Apps → Phone，看 My Number。[S16]

Android：Settings → About phone 或 About device，看 Phone number。官方注：Some Android versions display your phone number on this screen instead。[S16]

My3 或 Three app：登录后号码显示在 dashboard 上，官方原文 Once you're logged in, you'll see your phone number displayed on the dashboard。[S16]

邮件与单据：官方原文 You'll also find your number on your order confirmation, welcome emails, and bills。[S16]

实在找不到时，官方指向逐机型指引：Device Support → 选机型 → How-to Guides → Find my number。[S10]

官方资料没有说明：Three 是否提供发短信或拨号的查号短码。本轮查阅的 Three 官方 PAYG 帮助页没有列出任何查号短码，本文不推荐未经 Three 官方确认的短码，也不要把其他品牌的短码套用到 Three 上。[S16]

流量余量：Three app 或登录网页账户。官方原文 To check how much data you've got left, you can use the Three app or log into your account online，登录后 you'll be able to see your monthly data allowance。[S17]

账户余额：登录 My3。官方原文 You can top up, check your balance, buy Add-ons and more by logging in to My3. You can also download the Three app to check your account on the go。[S18]

当前 Data Pack：Three app 的 Home 或 Buy 标签。官方提示一条隐藏逻辑：Data Packs 这个入口 will only show if you don't have an active Data Pack；Add-ons 入口反之 will only show if you have an active Data Pack。[S6]

充值或买包的电话渠道：官方原文 Dial 444 free from your Three phone, or +447782 333 444 if you're using another phone。官方这几页只把 444 列为充值和买包渠道，没有写可以用 444 查余额。[S4][S6]

改或删 Add-on：官方原文 Joined us on or after 30 January 2023? You can also use the Three app to change or remove your Add-ons。不想用 App 也不想注册账户的人，官方写 If you don't want to use the Three app or create an account, you can also contact us。[S6]

一条容易踩的官方规则：You can only have one active Data Pack at a time，官方另写 As you can only buy 1 Data Pack at a time, you'll need to wait for it to expire before you can get a new one。中途想加量只能买 Add-on，或用余额按标准费率跑。[S6]

官方资料没有说明：登录 My3 后余额字段的具体名称、显示格式，以及该余额与可花的充值余额是否完全同义。本文不编造 App 或 My3 的具体菜单路径。[S18]

核心答案：必须先有 Data Pack 或充值余额。官方原文 You'll need a Data Pack or Top-up to start using your SIM。这一条同时也是上文激活定义一的组成部分，不存在插卡就能先用、以后再说的状态。[S4]

手机是 4G 或 5G 机型：条款 Quick Summary 写 3G-only 设备 will no longer work on the Three Network。[S1]

要打电话的话手机必须支持 4G Calling：官方网络支持页写 if you're using a 4G device without 4G Calling, you'll be able to text and use data, but calls won't work。[S2]

插卡时人在英国：条款术语表写 inserting your SIM into a Device while in the UK。[S1]

数据开关已打开：官方排查步骤写 Make sure mobile data is switched on。[S2]

双卡机把 Three 卡设为第一个卡槽的主卡，否则官方写会看到 No Service notice。[S12]

凭证要在购买后 90 天内激活：条款 Quick Summary 原文 All Pay As You Go Vouchers and Add-ons must be activated within 90 days of purchase，且部分凭证激活后还有有效期，条款举例 for example, 30 days。[S1]

出国前先在英国用一次或充一次：条款第 6.15 条加官方激活页，见上文。[S1][S3]

合同成立的时点：条款第 3.1 条写 Your agreement starts when we Connect you to Three. By inserting your SIM you are expressly requesting that Three provide you with our Services。[S1]

Three 官方把排查按症状分开列。以下内容来自官方网络支持页。[S2]

症状一，原本有信号最近突然没了：按顺序是确认设备支持 4G Calling；测试设备（开关飞行模式、确认移动数据已打开、检查系统是否为最新、关掉省电模式、重启设备、双卡机确认 Three 卡在第一个卡槽且为主卡、重置网络设置）；用 Network status checker 查是否有区域故障；查账户是否有问题，官方原文 Sometimes, an issue with a bill or a failed Top-up can stop access to our network. Log in to My3 or the Three app to check for any issues；试 Wi-Fi Calling；联系客服。[S2]

症状二，长期信号差或没信号：确认设备支持 4G Calling；确认问题只在某一地点发生还是到处都这样，只在一地就查覆盖和故障，到处都是很可能是设备问题，可以试开关数据、更新系统、重置网络设置；查账户是否有问题；试 Wi-Fi Calling；联系客服。[S2]

症状三，能通话但上不了网或网速慢：确认设备是 4G 或 5G ready；测试设备（同症状一的清单，但不含重置网络设置）；检查 APN 与重置网络设置，参数见上文 APN 一节；查已知故障；查账户是否有问题；先连 Wi-Fi 顶一下；联系客服。[S2]

症状四，插卡后完全不动怀疑卡没激活：官方在替换卡页面给了一个手动激活入口，原文 Your new SIM should already be active – just put it in and switch your device on. If it's not working, you may need to activate it on My3: Log into My3 → Go to More actions → Tap Activate SIM and follow the on-screen steps。[S19]

官方资料没有说明：这个 My3 → More actions → Activate SIM 入口对全新 PAYG 首次开卡是否同样可用。该段原文出现在替换卡页面，而新卡官方流程页完全没有提到 My3 里有任何手动激活按钮，只让你插卡等短信、有问题走 Live Chat。两页口径不一致，请联系 Three 官方客服确认。[S3][S19]

症状五，SIM 被 PIN 锁死：官方原文 You'll need to contact us and ask for either a PUK1 or PUK2 code – your phone will tell you which one you need，以及 If you've tried to guess your PUK code, or entered it wrong over 10 times, your SIM may get blocked. If that happens – it's easy to order a replacement SIM。[S9]

症状六，看不到信号格：官方两处都写 Can't see any signal bars? You might need to turn off Wi-Fi in your device settings for them to show。[S7][S8]

三处官方原文如下。PAYG 落地页 FAQ：to keep your Pay As You Go number active, you must use it for at least one chargeable activity … every 180 days。条款第 9.1(i) 条：you have not activated a Pay As You Go Voucher on your account or undertaken any chargeable events or activities … within the preceding 6 month period。同一个 PAYG 落地页另一条 FAQ：Do Pay As You Go SIM expire? Yes, if you don't use your Pay As You Go SIM for 18 months, then it will expire。[S1][S6]

前两条讲的其实是不同的事：180 天那条讲号码停用，条款 9.1(i) 讲 Three 有权暂停服务，18 个月那条讲 SIM 卡过期。但官方没有任何一页把三者的关系、先后顺序或优先级写出来，而且 180 天和 18 个月这两条就印在同一个页面上。

官方资料没有说明：三个期限各自的适用边界与优先关系。按最短的 180 天安排可以同时满足另外两个期限，反过来不成立，并且让用一次是计费行为（打一通电话、发一条短信或用一次流量）。条款 9.1(i) 列举的也是 made telephone calls, sent text or photo messages, accessed content or the internet。[S1][S6]

注册 Three app 或 My3：官方把它列为开通正式步骤之一，查余量、充值、买包、看账户问题都要用它，多个官方排查步骤也要求登录 My3 或 Three app 查账户。[S2][S4]

Auto Top-up：在 Three app 或 My3 里设置，可设为每月、每周，或余额低于设定值时自动充。官方排查步骤里写明充值失败会导致断网，开自动充值能降低这个风险。[S2][S20]

国际漫游开关：Three app 或账户的 Manage services。官方明确警告这项对新用户默认是开的，原文 international roaming is always turned on by default for new customers, so take care when you head overseas。[S20]

国际通话开关：同样在 Manage services，官方说明 when switched on, lets you make calls to other countries from the UK。[S20]

Premium rate services 开关：同样在 Manage services。官方定义是 micro-payments for things you've signed up for, like games, charity donations, or chat services，并把开关这几项的目的写成 This helps prevent any nasty surprises appearing on your bill。[S20]

语音信箱：在 Manage services 里开关，听留言从 Three 手机拨 123。官方注意事项：If your phone's been set up to divert calls, any missed calls will be put through to the diverted number, rather than your voicemail。逐机型指引另给出从其他手机拨 07782 333 123、在境外拨 +44 7782 333 123 的路径；通话费用不在本轮核实范围内。首次设置是从本机拨 123，按提示设置 PIN、录制姓名和留言问候语。[S20][S21]

语音信箱的 Fast Login 默认开启：官方安全页提醒从自己的手机拨入时，即使设过 PIN 也不要求输入。要关闭它，拨 123 后依次选 4、2、2、1；关闭后从本机听留言也要输入 PIN。[S22]

成人内容过滤默认已开：官方原文 We automatically protect all customers from accessing age-restricted sites, but switching this filter off is easy。知道它默认开着，免得纳闷某些网站打不开。[S20]

Wi-Fi Calling：在官方 Device Support 查本机是否支持并开启。官方在多处排查步骤里都推荐它。[S2][S10]

官方资料没有说明：Managing services on your account 页用的词是 the Three Pay As You Go app，而 Welcome to Pay As You Go 与 PAYG 落地页统一用 the Three app，官方没有说明这是两个不同的 App 还是同一个 App 的旧称。在应用商店搜索时如有疑问，请联系 Three 官方客服确认。[S4][S6][S20]

[S1] Pay As You Go Terms and Conditions, effective from 21 May 2026（PDF，Quick Summary、术语表、第 3.1、6.15、9.1 条）

[S2] Coverage and network status checker（three.co.uk）

[S3] Activating your Pay As You Go SIM（three.co.uk）

[S4] Welcome to Pay As You Go（three.co.uk）

[S5] eSIM Support（three.co.uk）

[S6] Pay As You Go Data Packs（three.co.uk）

[S7] SIM Support（three.co.uk）

[S8] Keeping your number — before you begin（three.co.uk）

[S9] Getting a PUK code（three.co.uk）

[S10] Three Device Support 逐机型 How-to guides（devicesupport.three.co.uk，含 iPhone 17 与 Samsung Galaxy S24 的 APN 指引）

[S11] Setting up your phone and SIM（three.co.uk）

[S12] Using Dual SIM devices（three.co.uk）

[S13] What kind of SIM do I need?（three.co.uk）

[S14] Delivery support（three.co.uk）

[S15] Seamless eSIM activation（three.co.uk）

[S16] Finding out your number（three.co.uk）

[S17] Checking your data allowance（three.co.uk）

[S18] Managing your account online（three.co.uk）

[S19] Getting and activating a replacement SIM（three.co.uk）

[S20] Managing services on your account（three.co.uk）

[S21] Using voicemail — Generic Android Device（devicesupport.three.co.uk）

[S22] Keeping you secure（three.co.uk）