ICASA approved signal boosters are legal. (Independent Communications Authority of South Africa) A legal signal booster will have an ICASA T/A number sticker on the product box as well as a sticker stuck on the product itself. It will look like this: e.g.: T/A-2018/1358 . If it does not have a sticker depicting this, it is illegal. The legal certifying body in South Africa is ICASA and not the FCC (USA) or (CE) which is a UK safety certification.  Do not be fooled, if the signal booster you have purchased is illegal, ICASA has detecting equipment and authorised officers to get a warrant, confiscate the repeater and you will possibly have to appear in a South African court on charges and end up with a fine.   South Africa be informed. https://www.icasa.org.za/pages/type-approval   Buys legal ICASA signal boosters:  https://sdexperts.co.za/online-store