<p>In Thailand, it is very common for moderate-sized stores and SME companies to provide multiple phone numbers rather than using single-number trunk line. (And you are expected to try the alternate numbers if you got a busy signal) These occurences are documented as such in my mapping journey by using the usual <a href="https://wiki.openstreetmap.org/wiki/Semi-colon_value_separator" rel="nofollow">semicolon-separated values</a>.</p>
<p>The problem is, main OpenStreetMap interface <strong>does not seem to mark <em>any</em> <code>tel:</code> link on POI's <a href="https://wiki.openstreetmap.org/wiki/Key:phone" rel="nofollow"><code>phone</code></a> key if this field contains semicolon separator(s)</strong>. This leaves numbers in affected POIs as plain text, and user must manually select and copy each of them into a dialer when they need to call-- a minor incovenience for desktop, but very painful for mobile.</p>
<p>Examples and screenshots:</p>
<ul>
<li>
<p><a href="https://www.openstreetmap.org/way/637578269" rel="nofollow">Nan Wan</a></p>
<pre><code>  phone = +66 86 394 4382;+66 62 559 6156
</code></pre>
<p><a target="_blank" rel="noopener noreferrer" href="https://camo.githubusercontent.com/83fd029f1f50846b734f6ef0020dd2dbf642971f/68747470733a2f2f752e6375626575706c6f61642e636f6d2f7877696e646f77732f6441354768562e706e67"><img src="https://camo.githubusercontent.com/83fd029f1f50846b734f6ef0020dd2dbf642971f/68747470733a2f2f752e6375626575706c6f61642e636f6d2f7877696e646f77732f6441354768562e706e67" alt="" data-canonical-src="https://u.cubeupload.com/xwindows/dA5GhV.png" style="max-width:100%;"></a></p>
</li>
<li>
<p><a href="https://www.openstreetmap.org/way/48966995" rel="nofollow">Bangkok Art and Culture Centre</a></p>
<pre><code>  phone = +66 2 214 6630;+66 2 214 6631;+66 2 214 6632;+66 2 214 6633;+66 2 214 6634;+66 2 214 6635;+66 2 214 6636;+66 2 214 6637;+66 2 214 6638
</code></pre>
<p><a target="_blank" rel="noopener noreferrer" href="https://camo.githubusercontent.com/d1e7606c6d7bc5be15467b7ae689546c27cc70d7/68747470733a2f2f752e6375626575706c6f61642e636f6d2f7877696e646f77732f7456756670732e706e67"><img src="https://camo.githubusercontent.com/d1e7606c6d7bc5be15467b7ae689546c27cc70d7/68747470733a2f2f752e6375626575706c6f61642e636f6d2f7877696e646f77732f7456756670732e706e67" alt="" data-canonical-src="https://u.cubeupload.com/xwindows/tVufps.png" style="max-width:100%;"></a></p>
</li>
<li>
<p><a href="https://www.openstreetmap.org/node/5304732122" rel="nofollow">Krungdeb Co-Operative Store</a></p>
<pre><code>  phone = +66 2 281 8228;+66 2 282 2489;+66 2 629 4265; +66 2 629 4266
</code></pre>
<p><a target="_blank" rel="noopener noreferrer" href="https://camo.githubusercontent.com/b210b90198e85718fabcd1c5bd96feba9dca51ce/68747470733a2f2f752e6375626575706c6f61642e636f6d2f7877696e646f77732f5439697858302e706e67"><img src="https://camo.githubusercontent.com/b210b90198e85718fabcd1c5bd96feba9dca51ce/68747470733a2f2f752e6375626575706c6f61642e636f6d2f7877696e646f77732f5439697858302e706e67" alt="" data-canonical-src="https://u.cubeupload.com/xwindows/T9ixX0.png" style="max-width:100%;"></a></p>
</li>
</ul>
<p>You would see that the telephone numbers are not autolinked. See <em>Notes</em> below for more (many, many more) examples.</p>
<p>Compare and contrast with POI bearing a single phone number:</p>
<ul>
<li>
<p><a href="https://www.openstreetmap.org/way/234856667" rel="nofollow">Pat Vintage Cafe</a></p>
<p><code>phone = +66 2 116 9966</code></p>
<p><a target="_blank" rel="noopener noreferrer" href="https://camo.githubusercontent.com/a533ae8d95450367cfdfb123ec5af311a6dd0f09/68747470733a2f2f752e6375626575706c6f61642e636f6d2f7877696e646f77732f364470514e552e706e67"><img src="https://camo.githubusercontent.com/a533ae8d95450367cfdfb123ec5af311a6dd0f09/68747470733a2f2f752e6375626575706c6f61642e636f6d2f7877696e646f77732f364470514e552e706e67" alt="" data-canonical-src="https://u.cubeupload.com/xwindows/6DpQNU.png" style="max-width:100%;"></a></p>
<p>You would see from the tooltip that phone number field is properly linked to tel:+6621169966.</p>
</li>
</ul>
<p>Please investigate and fix.</p>
<p>Browser: Opera 11.64 (Win32)<br>
System: Microsoft Windows XP Professional SP3</p>
<hr>
<h3>Notes</h3>
<ul>
<li><strong>Large number of places are affected by this</strong> (~10k nodes and ~6k ways POI).
<ul>
<li>Overpass (<a href="https://overpass-turbo.eu/?Q=%28node%5B%7E%22%5E%28contact%3A%29%3Fphone%28%3A.%2B%29%3F%24%22%7E%22%3B%22%5D%3B%28way%5B%7E%22%5E%28contact%3A%29%3Fphone%28%3A.%2B%29%3F%24%22%7E%22%3B%22%5D%3B%28._%3B%3E%3B%29%3B%29%3B%29-%3E._%3Bout%3B&R" rel="nofollow">Turbo</a> | <a href="https://overpass-api.de/api/interpreter?data=%28node%5B%7E%22%5E%28contact%3A%29%3Fphone%28%3A.%2B%29%3F%24%22%7E%22%3B%22%5D%3B%28way%5B%7E%22%5E%28contact%3A%29%3Fphone%28%3A.%2B%29%3F%24%22%7E%22%3B%22%5D%3B%28._%3B%3E%3B%29%3B%29%3B%29-%3E._%3Bout%3B" rel="nofollow">Raw</a>) takes several minutes to enumerate them all.</li>
<li>Try this Overpass <a href="https://overpass-turbo.eu/?Q=%28node%5B%7E%22%5E%28contact%3A%29%3Fphone%28%3A.%2B%29%3F%24%22%7E%22%3B%22%5D%28%7B%7Bbbox%7D%7D%29%3B%28way%5B%7E%22%5E%28contact%3A%29%3Fphone%28%3A.%2B%29%3F%24%22%7E%22%3B%22%5D%28%7B%7Bbbox%7D%7D%29%3B%28._%3B%3E%3B%29%3B%29%3B%29-%3E._%3Bout%3B" rel="nofollow">Turbo+BBox</a> query if you would like to look for them in specific area.</li>
</ul>
</li>
<li><strong>This problem is a server-side quirk.</strong>
<ul>
<li>It is not browser-specific.</li>
<li>The result is essentially the same when JavaScript is turned off.</li>
</ul>
</li>
<li>I'm not sure if <a href="https://wiki.openstreetmap.org/wiki/Key:fax" rel="nofollow"><code>fax</code></a>, <a href="https://wiki.openstreetmap.org/wiki/Key:contact" rel="nofollow"><code>contact:phone</code></a>, and <a href="https://wiki.openstreetmap.org/wiki/Key:contact" rel="nofollow"><code>contact:fax</code></a> key are also affected or not. If they are, the same provision should apply (so as their suffix keys).</li>
<li>Before anyone bring up the <code>:mobile</code> suffix of the <code>phone</code> key, please note that phone numbers of <em>Nan Wan</em> restaurant are <em>both</em> mobile. (The rest of them are <em>all</em> landline)</li>
</ul>

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