I have SK gateway available for *reducing blocking*
One port with *4/ 8/16 sims and work rotate*
intercalling function, *human behavior*
autometically *IMEI change* and *base station change*
SK gateway is also used *for sms traffic*
*16-64/16-128/16-256/32-128/32-256/32-512* models available

Skype: live:derek_5975
whatsApp # +0086 13064170171(phone)
email: derek@chinaskyline.net