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Archived App (Last seen on 1 Jan 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
This app enables dual SIM functionality and standby on iPhones, allowing calls and SMS with any inserted SIM. It also transforms iPads and iPod Touches into phones and includes anti-lost alarms and GPS tracking for your iPhone.
✓Dual SIM and Dual Standby on iPhone
✓Make calls and send SMS
✓Transforms iPads/iPods into phones
✓Anti-lost alarm (Mutual Find & Lost Alarm)
✓GPS location tracking for lost devices
✓Syncs contacts list
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What's New in Duo Plus
1.5
October 29, 2016
This app has been updated by Apple to display the Apple Watch app icon. Compatible with iOS10 Update database of Carrier information to fix the bug that carrier title isn't displayed correctly in some areas General bug fixes and performance enhancements
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FAQ
Does Duo Plus have ads?
No, Duo Plus does not contain advertisements, as indicated by the 'hasAds' flag being false.
What devices support Duo Plus?
Duo Plus supports Apple devices with iOS 7.1 or above, including various iPhone models, iPad 2 and above, all iPad mini series, and iPod Touch 5 and above.
How does the anti-lost alarm work in Duo Plus?
The anti-lost alarm has two modes: Mutual Find, where you can trigger an alarm on your iPhone from the BLE gadget to locate it, and Lost Alarm, which alerts you on your iPhone if the connection is lost.
Can I edit contacts directly in Duo Plus?
No, the Duo Plus app cannot edit contacts. To make any modifications to your contact information, you need to go to the Contacts app on your phone.
What is the GPS function in Duo Plus used for?
If the iPhone and BLE gadget lose connection, Duo Plus uses your iPhone's GPS to record and display the last known connection location on a map, helping you backtrack to find your device.
How often is Duo Plus updated?
The latest version of Duo Plus is 1.5, which was last updated on October 29, 2016. This indicates a less frequent update schedule.
What is the user rating for Duo Plus?
Duo Plus has a rating of 2.0 stars based on 1 rating. This suggests a low level of user satisfaction based on the available data.
Does Duo Plus require a constant Bluetooth connection?
Yes, Duo Plus relies on a Bluetooth connection to function for features like dual SIM, calls, SMS, and the anti-lost alarm. Continued use of GPS in the background can significantly decrease battery life.