What is the meaning of the statement, “of course, we may have to change remedies if we don’t get results” ? (see picture)

It means if one thing doesn’t work we change what we do and hope the next thing works

This is what i found on google “the first mobile phone call was made 40 years ago today. on april 3, 1973, motorola employee martin cooper stood in midtown manhattan and placed a call to the headquarters of bell labs in new jersey.” i hope this you for what your looking.