Razer 2 - Loss of Network Connection and Dropped Calls

Hello Everyone, I recently purchased the Razer 2 for use on the Rogers network in Canada. Everything seems to be working ok, but I have very frequent loss of network connection and dropped calls. I don't think it's a lack of, or weakness of, the network connection/signal as rebooting the phone results in reconnection. I can similarly force a reconnection by toggling "Airplane Mode" off and then back on. Playing with the "preferred network type" to (as close to) what my other phone is set for LTE/WCDMA/UMTS doesn't really seem to make a difference. Any suggestions?