which box better for imei repair?

Hello everbody! I have problems with repair imei Samsung Android phones for example Korean models (SM-906S-N906K-N910) not some box can’t repair imei I have any boxses (octopus.z3x.bst.GSPRO.) I looked Chimera tool updates and Falcon which the best? even some who have the offers?

one more question want to buy emmc jtag which is the best thanky you for helping!