diff --git a/mobile/geth.go b/mobile/geth.go
index 41341fac47..27f1c4ed97 100644
--- a/mobile/geth.go
+++ b/mobile/geth.go
@@ -153,6 +153,20 @@ func NewNode(datadir string, config *NodeConfig) (stack *Node, _ error) {
 				config.EthereumNetworkID = 3
 			}
 		}
+		// If we have the Rinkeby testnet, hard code the chain configs too
+		if config.EthereumGenesis == RinkebyGenesis() {
+			genesis.Config = params.RinkebyChainConfig
+			if config.EthereumNetworkID == 1 {
+				config.EthereumNetworkID = 4
+			}
+		}
+		// If we have the Goerli testnet, hard code the chain configs too
+		if config.EthereumGenesis == GoerliGenesis() {
+			genesis.Config = params.GoerliChainConfig
+			if config.EthereumNetworkID == 1 {
+				config.EthereumNetworkID = 5
+			}
+		}
 	}
 	// Register the Ethereum protocol if requested
 	if config.EthereumEnabled {