20 magabyte is not high at all.
The first time when I checked, it was not 20. It was more than 20 Mb or am I the one that have forgotten it?
Are you sure the network is bad? Someone told you or you experienced it yourself?
The network is very bad. I have tried several time to register but all was vain. I don't have to pay a transport or someone information. I downloaded the app by myself and tried it.
About the registration process, it was disappointing and discouraging at the started when the wallet was launched and it is the gold wallet now. Check the image below:
even till now the registration process is disappointing and that is where their network issue is coming. It will only be loading for more than hours.
Bronze and silver wallet should not be of stress. Also the gold wallet should not be of a stress again.
I have not pass the registration process so I have not seen these processes.