使用 F21 Pro 搭配 Dumber OS（前身為 Dumbdroid）已經四個月了。這段時間，在 Claude CLI 的協助下，幾個一直困擾我的問題終於得到初步解決：

USB-C 耳機：Dumber OS 的軟體問題導致 F21 插入 USB-C 耳機後無法正常連線，完全沒有聲音輸出。目前需要透過額外的腳本來手動觸發。→ qin-f21-usbc-audio
TT9 注音輸入法：Dumber OS 預設的 TT9 雖有內建中文輸入，但只支援拼音（簡體中文）。因為我習慣用注音，所以請 Claude 幫我把 TT9 裡隱藏的注音功能挖出來啟用。→ tt9-bopomofo-zhuyin
按鍵對應優化：Android 生態幾乎全是為觸控設計的，為了讓 T9 實體按鍵發揮更大的作用，我透過 Claude 調整了系統設定，讓特定按鍵可以直接執行功能，例如用 Molly 接聽或拒絕來電。

近期 Dumbphone 圈的一些動態：

Light Developer Program：Light 宣布開放開發者計畫。我覺得這個方向是對的——靠 Light 自己的小團隊等新功能，說真的還真的需要一些耐心。我個人最期待 Light Phone III 能原生支援 Signal；另一個願望是中文/注音輸入，但考量到他們的主要用戶群是英美市場，這個可能性恐怕不高。

Sidephone：外型和 F21 Pro 相近，主打可換式鍵盤，三月份開始陸續出貨。看了幾篇社群評測，系統優化感覺還需要一些時間；同樣是跑 Android，但某些功能的設定流程似乎比較繁瑣。售價 299 美元。

Commodore Callback 8020：一台掀蓋式手機，跑 Sailfish OS（Linux-based），號稱相容 99% 的 Android 應用程式，配備 T9 鍵盤、高解析度音訊，還附贈 IEM 耳機。主打封鎖社群媒體與瀏覽器、不出售用戶資料、實體隱私開關。售價 499 美元，目前開放預購。

回到 F21。目前最明顯的缺口是 Wi-Fi Calling，但根據開發者的說明，這在技術上有相當難度。另一個讓我有點頭痛的問題是 Molly/Signal 無法長時間在背景執行——訊息和來電通知常常延遲，需要手動開啟 app 才會同步。

有時候我會問自己：如果 Light Phone III 真的支援了 Signal，我會換嗎？答案大概是不會。F21 搭配 Dumber OS 有幾個很難被取代的優勢：

體積夠小，塞進口袋剛剛好。
資料不須上傳到 Light 的伺服器，隱私自己掌控。
續航力強，大約可以撐四到五天。
現成的 app 生態，不需要等官方慢慢開發。
系統可自由調整，更新頻率也高。

Four Months with the Dumber OS-flashed F21 Pro

It has been four months since I started daily-driving the Qin F21 Pro with Dumber OS (formerly Dumbdroid). Over that time, with the help of Claude CLI, several issues that had been bugging me finally got sorted out:

USB-C headphones: A software bug in Dumber OS causes the F21 to fail to establish a proper connection when a USB-C headphone is plugged in — no audio at all. The current workaround requires a manually triggered script. → https://github.com/taitungsun/qin-f21-usbc-audio
TT9 Bopomofo input: TT9, the default input method in Dumber OS, does include Chinese input — but only Pinyin (Simplified Chinese). Since I use Bopomofo, I used Claude to dig out and enable the hidden Bopomofo support that was already baked into TT9. → https://github.com/taitungsun/tt9-bopomofo-zhuyin
Keypad remapping: Almost everything in the Android ecosystem is designed for touchscreens. To get more out of the physical T9 keypad, I worked with Claude to remap certain keys to trigger specific actions — like answering or rejecting calls directly from Molly.

A few things happening in the dumbphone space:

Light Developer Program: Light has opened up a developer program. I think it's the right call — waiting on a small team to ship every feature themselves requires a lot of patience. My top wish for the Light Phone III is native Signal support; Chinese/Bopomofo input would be great too, but given their core market is English-speaking, that one feels like a long shot.
Sidephone: Similar form factor to the F21 Pro, with swappable keyboards as its headline feature. Units started shipping in March. From what I've read in community reviews, the software still needs some polish — it runs Android, but getting certain features to work seems more involved than it should be. Priced at $299.
Commodore Callback 8020: A flip phone running Sailfish OS (Linux-based), claiming compatibility with 99% of Android apps. It comes with a T9 keypad, high-res audio, and a bundled IEM. The pitch is privacy-first: social media and browser blocking, no data selling, and hardware privacy switches. $499, now available for pre-order.

Back to the F21. The most noticeable gap right now is Wi-Fi Calling — though from what the developer has said, it's a technically hard problem. The other pain point is that Molly/Signal can't stay alive in the background for long, which means notifications often don't come through until I manually open the app.

Sometimes I ask myself: if the Light Phone III ever gets Signal support, would I actually switch? Probably not. The F21 with Dumber OS has a few advantages that are hard to give up:

Small enough to pocket comfortably.
Data stays off Light's servers — privacy on my own terms.
Strong battery life — around four to five days on a charge.
A ready-made app ecosystem, without waiting on an official roadmap.
Full system tunability, with frequent updates.

2026年6月19日星期五