DoCoMo to Offer Overseas Roaming-Capable 3G Phones  TOKYO (Reuters) - Top Japanese wireless carrier NTT DoCoMo  &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=9437.T qtype=sym infotype=info qcat=news"&gt;9437.T&lt;/A&gt; said on Thursday it would launch a 3G phone equipped  for use overseas and including a video conferencing function,  getting a leg-up on its closest rival, KDDI Corp. &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=9433.T qtype=sym infotype=info qcat=news"&gt;9433.T&lt;/A&gt;.