Hello and welcome to the forums,
I was unable to reproduce the error you're receiving. Everything is working fine on my local version 1.2.2. Did you, by any chance, made any modifications on your installation? Disabled some fields, probably through the database?
Regardless, to bring you an immediate fix for the issue at hand, edit the file /home/mprodesi/public_html/crm/modules/CRM/PhoneCall/PhoneCallCommon_0.php, change line 44 to:
$phone = $l.': '.(isset($cus[$id])?$cus[$id]:'error');
. This should get rid of that particular error.
Kind regards,
Arek