I'm not sure how this is a Fairphone alternative when "Fair" is the most important part of Fairphone (ethical manufacturing, and not having child/slave labor in the supply chains). This one sounds like it went in the opposite direction, by making it cheap at the cost of questionable supply chains.

edit: they acknowledge it in their report as something they may work on in the future https://www.eqs-news.com/media/document/6de6e559-8027-4035-a697-d84378170ae3/assets/DE0005156004-JA-2022-EQ-E-01.pdf

No one knows what the future will bring. But what we do know is that if we protect our environment, conserve resources and take our fellow human beings into consideration, the years and decades ahead will be better. [...] In order to manufacture our products, however, we still have to purchase components such as microchips and storage media from the Far East or from other regions of the world. It is not always possible to fully monitor their manufacturing processes and supply chains. Gigaset therefore strives to make the preliminary stages transparent and to optimize them further.