Some mobile browsers such as Google Chrome for iOS may disallow select-and-copy of the initial Counterwallet pass phrase. Those who cannot reliably remember a 12 word pass phrase may find that inconvenient.
One workaround is to create a new wallet with Quick Access URL on your desktop and then securely share the URL with yourself on your mobile client (using a secure instant messaging system or secure online file sharing site).
Remember to not share your Quick Access URL password. The password should be remembered and not copied or stored on your mobile device.
Also, do not send Quick Access URL via email.