Both vodafone and telecom often have delays under peak traffic times.&nbsp; Most notably around holiday periods (new years eve etc.) but has often occured at other times as well.<br><br>Theres also politics involved around sending SMS&#39;s off-net to other carriers, 
i.e. Telecom might not allow you to send to vodafone australia.&nbsp; The recent introduction of number portability also introduces delivery issues (the carriers themselves don&#39;t send to ported numbers, the sender has to send to the correct carrier).&nbsp; To this end, there is a webservice (monthly subscription fee to access) that gives you a csv list (full list, and daily list) of ported numbers.
<br><br><div><span class="gmail_quote">On 4/17/07, <b class="gmail_sendername">Philip D&#39;Ath</b> &lt;<a href="mailto:pid@ifm.net.nz">pid@ifm.net.nz</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I don&#39;t recall ever noticing a lag of hours for SMS delivery (I don&#39;t<br>ever recall a TXT taking more than 60s to be delivered) but I guess<br>different TXT processing systems use different methods for getting the
<br>TXT into the network for delivery.<br></blockquote></div><br>