Comment 7 for bug 1710972

selected="selected" is perfectly cromulant:

"... its value must either be the empty string or a __value that is an ASCII case-insensitive match for the attribute's canonical name, with no leading or trailing whitespace__."

and is used elsewhere in the OPAC templates. A bare "selected" is also fine, but it's not worth a patch changing to it in just one place.

Anyway, I'm not able to reproduce a bug: if I set a default mobile carrier in preferences, it gets pre-selected on the form. Consequently, I'm marking this one invalid; if you can get a problem to happen consistently, feel free to reopen this one.