Have a VS-GW1600 - 4 new SIM card verified working in cell phone, have 2 or 3 bars of service where the gateway is. Once in the GSM gatway, the SIM IMSI shows up, but never detects a cell signal. Carrier is T-Mobile USA. Always seeing Registration status as Searching or Not Registered. Module status NET REQ
Sorry for the trouble.Please prepare remote access for me.Both Teamviewer and AnyDesk are ok.I will help you to solve your problem.
BTW,i will add your skype for a convenient contact.My skype: This email address is being protected from spambots. You need JavaScript enabled to view it.