04-20-2025, 04:43 AM
最近出國時我發現市面上有不少所謂「出租 eSIM 旅遊卡」，聲稱掃個 QR Code 就能上網，價格也比正規 eSIM 還便宜。不過，用過幾次後我開始產生一些疑問，查了一些資料，也結合自己的經驗整理這篇，希望對大家有幫助。
? 1. 為什麼很多出租 eSIM 要我提供 IMEI？
一開始我也覺得奇怪，怎麼買個上網卡還要交出手機的 IMEI？他們的說法是「為了確認手機支援 eSIM，避免你買了不能用要退費很麻煩」，聽起來好像很合理。
但其實 IMEI 是手機的唯一身分碼，一旦被不良商家拿去亂登記（例如報失、黑名單），後果可能很麻煩。還有一種說法是，有些業者會拿去做大數據分析，甚至販售給第三方。
✅ 建議：如果真的要提供，最多只給 IMEI 的前 8 碼（TAC 型號碼）就好，其實這樣就能查出手機支援與否了。
? 2. 流量共享可能讓你無辜中槍？
出租型 eSIM 最大的問題其實是「共用性」。
你今天掃了 QR code 安裝一張卡，但這張卡可能剛剛被別人用過。你們使用的出口 IP 是一樣的，如果前一個用戶在某網站有過違規行為、或做過一些敏感操作，你也可能被誤認為是同一人，導致被封鎖、驗證、甚至無法登入某些帳戶。
我有一次用這種卡打開 Gmail，結果一直跳出風控驗證，差點鎖帳號，超不爽。
✅ 建議：這類卡只拿來上網查資料、用 Google Map、翻譯工具還 OK，但千萬不要用來登入重要帳戶（像 Google、銀行、雲端硬碟等）。
? 3. 即使只是數據卡，還是有風險？
有人會說「它又沒語音又沒簡訊，只是上網而已，有什麼危險？」
其實就算只是流量卡，還是存在這些問題：
- 出站 IP 容易被封
- 用過的 IP 被廣告商追蹤
- 業者偷偷記錄你裝置的資料和使用時間
- 有些會要求你下載他們的 App，裡面權限開很大
? 那還能不能用出租 eSIM？
我的看法是：不是不能用，但要有風險意識。
如果你只是出國幾天，需要臨時上網查地圖、叫車、找餐廳，那還 OK。但如果你要拿來登入重要帳號、收公司郵件、處理金融交易，那就千萬不要用來源不明或便宜到不合理的 eSIM。
我個人後來改用像 Airalo、Ubigi、3HK 這種比較知名、來源清楚的平台，貴一點但安心很多。而且基本都支援 QR code 安裝，不用提供 IMEI，更不需要安裝奇怪的 App。
✅ 總結一下：
- 能不用出租型 eSIM 就別用，風險不小
- 如果真的要用，只做低風險用途
- 絕對不要亂給完整 IMEI，也不要亂裝來源不明的 App
- 選擇品牌透明、有評價的平台比較保險
（本文版權所有，禁止任何形式的轉載與抄襲）
During my recent international trips, I came across many so-called “rental eSIM” services. They claim to offer easy setup with just a QR code and are often cheaper than regular eSIMs. But after using them a few times, I started to notice some red flags. Here’s what I found — hope this helps others avoid trouble.
? 1. Why Do They Ask for My IMEI?
Many rental eSIM providers ask for your phone’s IMEI to “confirm device compatibility.” Sounds reasonable, right?
But IMEI is your phone’s unique identity. If it falls into the wrong hands, someone could report your device as stolen or use it for tracking or data collection. In some cases, it may even be sold to advertisers or data brokers.
✅ Tip: If you must provide something, just give the first 8 digits (TAC code). That’s usually enough to check device support.
? 2. Shared Connections = Shared Risk
These rental eSIMs are often recycled and used by many people. That means your internet traffic might go through the same IP address as a previous user.
If someone before you used that IP for shady things, you might get blocked by websites, face login issues, or be flagged by Google, etc. It happened to me — Gmail kept forcing security checks because of suspicious activity from the shared IP.
✅ Tip: Avoid logging into personal or sensitive accounts when using a rental eSIM.
? 3. "Just Data" Still Has Risks
Even if the eSIM doesn’t offer calls or SMS, there are still risks:
- Shared or flagged IP addresses
- Tracking by advertisers using your data footprint
- Some providers ask you to install apps with excessive permissions
- Your device info and usage may be logged without you knowing
? So, Can I Still Use Rental eSIMs?
Yes — but only for low-risk tasks like:
- Using Google Maps
- Searching for food or transit
- Checking weather or translation apps
Just don’t use it for logging into emails, banks, or anything sensitive.
I personally switched to known providers like Airalo, Ubigi, or 3HK. They cost a bit more, but they’re transparent and don’t ask for sensitive info.
✅ Summary Tips:
- Use rental eSIMs only if necessary, and only for basic browsing
- Never give out your full IMEI unless absolutely needed
- Don’t install unknown apps from shady providers
- Stick to trusted platforms for peace of mind
Let me know if you’ve had similar experiences, or if you’ve found a safe provider. Hope this helps!
(This article is copyrighted, reproduction and plagiarism of any kind are prohibited)
? 1. 為什麼很多出租 eSIM 要我提供 IMEI？
一開始我也覺得奇怪，怎麼買個上網卡還要交出手機的 IMEI？他們的說法是「為了確認手機支援 eSIM，避免你買了不能用要退費很麻煩」，聽起來好像很合理。
但其實 IMEI 是手機的唯一身分碼，一旦被不良商家拿去亂登記（例如報失、黑名單），後果可能很麻煩。還有一種說法是，有些業者會拿去做大數據分析，甚至販售給第三方。
✅ 建議：如果真的要提供，最多只給 IMEI 的前 8 碼（TAC 型號碼）就好，其實這樣就能查出手機支援與否了。
? 2. 流量共享可能讓你無辜中槍？
出租型 eSIM 最大的問題其實是「共用性」。
你今天掃了 QR code 安裝一張卡，但這張卡可能剛剛被別人用過。你們使用的出口 IP 是一樣的，如果前一個用戶在某網站有過違規行為、或做過一些敏感操作，你也可能被誤認為是同一人，導致被封鎖、驗證、甚至無法登入某些帳戶。
我有一次用這種卡打開 Gmail，結果一直跳出風控驗證，差點鎖帳號，超不爽。
✅ 建議：這類卡只拿來上網查資料、用 Google Map、翻譯工具還 OK，但千萬不要用來登入重要帳戶（像 Google、銀行、雲端硬碟等）。
? 3. 即使只是數據卡，還是有風險？
有人會說「它又沒語音又沒簡訊，只是上網而已，有什麼危險？」
其實就算只是流量卡，還是存在這些問題：
- 出站 IP 容易被封
- 用過的 IP 被廣告商追蹤
- 業者偷偷記錄你裝置的資料和使用時間
- 有些會要求你下載他們的 App，裡面權限開很大
? 那還能不能用出租 eSIM？
我的看法是：不是不能用，但要有風險意識。
如果你只是出國幾天，需要臨時上網查地圖、叫車、找餐廳，那還 OK。但如果你要拿來登入重要帳號、收公司郵件、處理金融交易，那就千萬不要用來源不明或便宜到不合理的 eSIM。
我個人後來改用像 Airalo、Ubigi、3HK 這種比較知名、來源清楚的平台，貴一點但安心很多。而且基本都支援 QR code 安裝，不用提供 IMEI，更不需要安裝奇怪的 App。
✅ 總結一下：
- 能不用出租型 eSIM 就別用，風險不小
- 如果真的要用，只做低風險用途
- 絕對不要亂給完整 IMEI，也不要亂裝來源不明的 App
- 選擇品牌透明、有評價的平台比較保險
（本文版權所有，禁止任何形式的轉載與抄襲）
During my recent international trips, I came across many so-called “rental eSIM” services. They claim to offer easy setup with just a QR code and are often cheaper than regular eSIMs. But after using them a few times, I started to notice some red flags. Here’s what I found — hope this helps others avoid trouble.
? 1. Why Do They Ask for My IMEI?
Many rental eSIM providers ask for your phone’s IMEI to “confirm device compatibility.” Sounds reasonable, right?
But IMEI is your phone’s unique identity. If it falls into the wrong hands, someone could report your device as stolen or use it for tracking or data collection. In some cases, it may even be sold to advertisers or data brokers.
✅ Tip: If you must provide something, just give the first 8 digits (TAC code). That’s usually enough to check device support.
? 2. Shared Connections = Shared Risk
These rental eSIMs are often recycled and used by many people. That means your internet traffic might go through the same IP address as a previous user.
If someone before you used that IP for shady things, you might get blocked by websites, face login issues, or be flagged by Google, etc. It happened to me — Gmail kept forcing security checks because of suspicious activity from the shared IP.
✅ Tip: Avoid logging into personal or sensitive accounts when using a rental eSIM.
? 3. "Just Data" Still Has Risks
Even if the eSIM doesn’t offer calls or SMS, there are still risks:
- Shared or flagged IP addresses
- Tracking by advertisers using your data footprint
- Some providers ask you to install apps with excessive permissions
- Your device info and usage may be logged without you knowing
? So, Can I Still Use Rental eSIMs?
Yes — but only for low-risk tasks like:
- Using Google Maps
- Searching for food or transit
- Checking weather or translation apps
Just don’t use it for logging into emails, banks, or anything sensitive.
I personally switched to known providers like Airalo, Ubigi, or 3HK. They cost a bit more, but they’re transparent and don’t ask for sensitive info.
✅ Summary Tips:
- Use rental eSIMs only if necessary, and only for basic browsing
- Never give out your full IMEI unless absolutely needed
- Don’t install unknown apps from shady providers
- Stick to trusted platforms for peace of mind
Let me know if you’ve had similar experiences, or if you’ve found a safe provider. Hope this helps!
(This article is copyrighted, reproduction and plagiarism of any kind are prohibited)