ISP provided a 150mbps router DWR-M921 as you can see specs its a 150mpbs 10/100 lan , i want to upgrade to a 300mpbs 10/100/1000 lan but unfortunately im forced to use this one

most ISP pair their simcard with the imei number of the router they supply in fact customer is forced to use the router what carrier will supply. no more upgrade or change powerful router unless imei...