China United Network Communications Corporation Limited
Utilities v13.2
Does 中国联通 work on iPhone Duo?
It works, but with black bars. 中国联通 13.2 is built with the iOS 26.4 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
At a glance
- Inner display (7.6″)
- Black bars
- Outer display (5.4″)
- Works normally
- Built with
- iOS 26.4 SDK
- Version 13.2, read Oct 31, 2026
- iPad version
- Yes
- Layout already handles big screens
- Latest version
- v13.2
- Oct 30, 2026
- Duo in release notes
- Not yet
About 中国联通
中国联通 is made by China United Network Communications Corporation Limited and first came out on the App Store in March 2011. It has 1,287 ratings on the US App Store, averaging 2.5 stars. Version 13.2 came out on Oct 30, 2026 and needs iOS 13.0 or later. It's free to download.
From its App Store listing:
中国联通APP13.0重磅升级！手机闪送全新上线，让美好更近一步。 中国联通APP集查询交费、业务办理、手机闪送、宽带智能家居、靓号套餐、影音生活权益等多领域、全方位服务于一身，致力于为用户提供更优质的使用体验，创造更便捷、更个性化的美好智慧生活。 （手机闪送功能各省陆续开放中） 【爆款新机：超值好价，极速闪送】 •极速闪送：APP下单，门店极速配送或到店自提，爆款新机不用等。 •购机直降：购机券包、厅内直降，优惠享不停。 •合约购机：官方正品，1对1服务，快速响应。 【智能提醒：流量消耗快、账户异常】 •流量提醒：消耗快、余量低、达量限速，立即提醒。 •账户提醒：停机、挂失等账户异常问题，一键直达处理页面。 【宽带续约：更省时，更高效】 •续费续约：不出门，不排队，一键搞定，高效办理。 •升级千兆：超高速网络，全屋覆盖，WiFi无死角。 【套餐精准匹配：越用越划算】 •用得舒心：拒绝流量…
On the inner display
Apps built with older SDKs are placed in a phone-sized safe area on a black background. Everything works; you just don't get the bigger screen.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including 中国联通. Open it on the inner display, then add a second app next to it. You can save the pair and come back to it later.
Duo-specific features
None confirmed yet. Duo-specific features include side toolbars, layouts that react to the fold, and content on the outer display while the app is open inside.
Evidence & history
App build,
Version 13.2 is built with the iOS 26.4 SDK
Apple runs apps built with the iOS 26 SDK or earlier in a phone-sized window on the inner display.
- : Not confirmed yet → Black bars — built with the iOS 26.4 SDK
Latest release notes
Version 13.2 · Oct 30, 2026
1.消息页全新改版：消息分类呈现，服务会话直达，查阅更方便。 2.优化系统能力，提升运行稳定性。
Questions
Does 中国联通 work on iPhone Duo?
It works, but with black bars. 中国联通 13.2 is built with the iOS 26.4 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does 中国联通 work on the outer display?
Yes. iPhone Duo's 5.4-inch outer display behaves like a regular iPhone screen, so every iPhone app works there as usual.
Can I use 中国联通 in Split View on iPhone Duo?
Yes. On iPhone Duo every app can be placed side by side with another app on the inner display — developers don't need to opt in. How comfortable it feels at half width depends on the app's layout.
Why does 中国联通 have black bars on iPhone Duo?
Apps built with the iOS 26 SDK or earlier run in a phone-sized window on the inner display, and iOS 27 builds can still leave some space empty. The bars disappear once the developer rebuilds the app with the iOS 27.1 SDK — you only need to update the app.
When will 中国联通 fill iPhone Duo's inner display?
When its developer releases an update built with the iOS 27.1 SDK or later. We read the SDK of every new version of 中国联通 within about a day of its release and update this page.
What can I do about the black bars until then?
Use 中国联通 on the outer display, where it works like on any iPhone, or put it in Split View next to another app on the inner display so less of the screen goes unused.