Drychwch be ffeindies i ar <a href="https://www.youraccount.orange.co.uk/Netonomy/MyWeb/user_message.jsp?funct=STANDARD_USER.SSS.ACCOUNT.ADD&message=%57%65+%64%6f%6e%27%74+%70%72%6f%76%69%64%65+%61+%57%65%6c%73%68%2d%6c%61%6e%67%75%61%67%65+%73%65%72%76%69%63%65+%62%65%63%61%75%73%65+%77%65+%64%6f%6e%27%74+%67%69%76%65+%61+%73%68%69%74+%61%62%6f%75%74+%79%6f%75%72+%6c%61%6e%67%75%61%67%65%2e%3c%62%72+%2f%3e%3c%62%72+%2f%3e%57%65+%6a%75%73%74+%77%61%6e%74+%79%6f%75%72+%6d%6f%6e%65%79%2e&mfunc=18&ctx=P&cfunc=68&oid=L6%3A338065">wefan Orange</a>, wrth drio holi am wasanaeth Cymraeg.