Best KaiOS phone in the USA for developers: Alcatel 4044x/A405DL/4052x, Doro 7050… or none?

It seems that in the United States there are many Alcatel phones with the KaiOS operating system, but in reality there are only three basic models, and the variant is indicated by the last letter in the model name.

There is a lot of confusion between the models, due to the decisions of the carriers with which they are sold, whether or not they want to allow the use of different SIM cards.

Let’s clarify:

All Alcatel phones sold in the United States that support KaiOS are locked, except for some One Touch models of the 4044 series, released in 2017.
This series represents the first KaiOS devices in the world, with version 1.0 on board.
Being an old version of the software, the latest APIs, including those needed to use WhatsApp, are not supported.
The Alcatel Go Flip 4044T and Alcatel Cingular Flip 2 40440 (with the AT&T logo instead of the brand Alcatel) are the only ones that support USB debugging.
By typing the secret code * # * # 3 3 2 8 4 # * # * you will be able to use a working ADB shell, and connect to the development tools dedicated to KaiOS and Firefox OS, such as WebIDE.
But only these two variants can be used by a developer.
In fact other models, such as 4044C and 4044N are not enabled for debugging, even though they are of the same series.

Alcatel A405DL “MyFlip” arrives with a more recent software version, KaiOS 2.5, with support for the KaiStore but not for WhatsApp. The debug code will allow you to use ADB, but without USB debugging. MyFlip is a locked device.

Finally, the various models released in 2019 under the name of Alcatel Go Flip 3 and Alcatel SMARTFLIP, which are actually all from the 4052X series, support KaiOS 2.5.1 and WhatsApp, but they are still locked devices. Among the various models we mention 4052R, 4052C, 4052W and 4052Z. None of them is able to get the USB debugging. The previous code only allows to use a normal ADB shell.

In summary, the only KaiOS devices sold in the United States on which applications can be developed are only Alcatel Cingular Flip 2, also known as One Touch 4044O, and Alcatel Go Flip 4044T, but they have KaiOS 1.0, with no possibility of updating, and without support for the more recent APIs.

All other models are useful for making calls and texting, but not for developing applications.

The Doro 7050 (model DFC-0180) is also locked, just like its European cousins ​​Doro 7060 and Doro 7070.
However, there is someone that claims to have been able to enable debugging on the latter, in the simplest way, by typing the debug code, but these are certainly prototypes resold on the internet and without clarification on their origin.

The only solution for American KaiOS developers is to buy an unlocked phone from abroad, for example the various Nokia 8110, 2720 Flip and 800 Tough, or an Energizer Energy E241S. However, everyone would not guarantee suitable network coverage in the United States, but they have more up-to-date APIs to develop applications.

I hope this video has been useful at least to clarify the differences between the various KaiOS devices made in the USA, lost among the countless variations all required to confuse the end user.

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KaiOS is a new operating system for ARM chipsets, running on a Linux kernel. It is written in Javascript, HTML and CSS and is oriented towards smart feature phones. In fact, it works well on 512 MiB of RAM or less. Some of the most popular KaiOS phones are the Nokia 8110 4G, 2720 Flip and 800 Tough, Jio Phone, Positivo P70S, Orange Sanza and other new Energizer phones.
Kaiostech recently partnered with Mozilla, the creator of Firefox OS and the Gecko engine on which KaiOS is based.
Developing it is an opportunity for those who want a more open source alternative to Android and iOS in the mobile market. Do you want to know more about KaiOS phones? Here is a complete list for developers:

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