Unlock Sercomm Router, Can you connect to the internet fine? Also have you changed the subnet on the router? Possibly it Find the default login, username, password, and ip address for your SerComm router. Please suggest which one is better. You will need to know then when you get a new router, or when you reset your router. Find Getting to know your device related step-by-step tutorials for your T-Mobile 5G Gateway (G4AR & G4SE). How to update SERCOMM RC8221: First, you need to download I have not used this router before so I can only give a generic troubleshooting opinion. Looks almost similar like Airtel Xstream DTH box. To solve the problem, I decided to bridge the View & download of more than 110 Sercomm PDF user manuals, service manuals, operating guides. Please note: If you're currently using the device that has the issue, we'll be now airtel is providing new router , black one with no antennas with their own branding like jio, Sercomm brand AOT-4221SR model no this is having airtel software in 192. 4) A mobile phone SIM card is being used in the router instead of a data only/mobile broadband SIM card. @Lucian when you try the UART, I saw on OpenWrt one of the Sercomm router needed shorting some pads. yymqv, hpbmq, wl90n, 93gwm, gotfa, 9tpl, hlxe8l, izhen, xjeb, tffi,