Can't he retrieve/reset his Gmail password?
That's nothing to do with 48 anyway.
To get access to his 48 account he'll need to contact 48 support.
See the link in my signature below.
They are also contactable via email: support@48months.zendesk.com
Another 48 user (you?) could also gift him credit and he could fix up with them as a stopgap.
Hope this helps.
