ismangy5 years ago000It only works with certain sim cards? With the Yallo one, it doesn't work :(Show in original language (French)Anonymous5 years ago • purchased this product000purchased this product Helpful answerMaybe you need to deactivate the SIM PIN code. To do this you need to insert the SIM into a phone and go into the security settings (there are online guides that explain the process for each OS). For me the watch works with a M-Budget SIMShow in original language (French)Comment