I bought my first .com domain today, having recently used a country-specific domain. My registrar had to create an account for me on their new billing system to enable the transaction as part of the process and I didn't get a chance to review the contact details. Turns out, my personal mobile number is now in the WHOIS database and my registrar says they have no capability to change the entry.
Is there any way I can go about getting it changed myself?