USSD codes are a series of numbers and symbols that you need to enter into your phone or call application. All you have to do now is type 'code for Lenovo IdeaPhone A830 (White) Menu Engineering' in any search engine. Every code for a particular device has been known for a long time, some of them even before the device was released. The last sure-fire way is to simply search the internet. A good example of this is Chinese brands, which discreetly answer this question on popular marketplaces. They are usually found in the technical documentation, a small booklet that comes in the phone's box and that 95% of people throw away after opening.Īnother way to find out the USSD code for a particular model is to contact the manufacturer directly. The codes that unlock certain functions are known only to the smartphone manufacturer. Lenovo IdeaPhone A830 (White) special codes and where they can be obtained However, you need to know special USSD codes that can be used to open engineering mode in the Lenovo IdeaPhone A830 (White).

However, the tech menu is still necessary for some users and all phone manufacturers offer free access to it, with the possible exception of Apple's shopping mode. The guaranteed result is that the speakers will fail sooner. This function allows you to increase the volume beyond the maximum level intended by the smartphone's designers. This is for the safety of the user, as many settings in the engineering mode can drastically change the way the device works.įor example, the most popular function in the Engineering mode is Volume Boost. Highly specialised and dangerous features are hidden in the engineering mode or developer mode. The developers of most Android-based operating systems do not provide users with all the customisation options for their smartphones.

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