I would like to use an older Netgear 3G modem router on Spark - model 3G38WV. THis was previously setup and used on the Telecom network with a Telecom SIM.

The router has an external antenna connection and should provide better coverage inside my metal clad caravan when out on the road. 

Can I simply purchase a new Spark SIM and hookup as a new connection? Or is the modem incompatible?

Many thanks - Paul