I have been having issue with white space appearing between image slice in my HTML email only in iPhone 6. I know, one of the solution is to slice it just horizontally. However, my client wishes it to be sliced in this fashion.

Please find the code of how I am stacking the sliced images which together form, the banner.

<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td>
<img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard1.jpg" alt="Shop products inspired by your favorite HBO shows" width="600" />
</td>
</tr>
<tr>
<td>
    <table border="0" cellspacing="0" cellpadding="0">
    <tr>
    <td>
    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard2.jpg" alt="True Blood Merlotte's women's slim fit V-neck T-shirt." width="300" border="0" />
    </td>
    <td border="0" cellspacing="0" cellpadding="0">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard3.jpg" alt="" width="300" border="0" />

    </td>
    </tr>
    <tr>
    <td border="0" cellspacing="0" cellpadding="0">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard4.jpg" alt="" width="300" border="0" />

    </td>
    <td border="0" cellspacing="0" cellpadding="0">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard5.jpg" alt="Silicon Valley Pied Piper 2.0 logo T-shirt" width="300" border="0" />

    </td>
    </tr>
    <tr>
    <td border="0" cellspacing="0" cellpadding="0">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard6.jpg" alt="" width="300" border="0" />

    </td>
    <td border="0" cellspacing="0" cellpadding="0">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard7.jpg" alt="Limited time only. Gear up for the survivor 30th season premiere. SHOP NOW." width="300" border="0" />

    </td>
    </tr>
    <tr>
    <td border="0" cellspacing="0" cellpadding="0">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard8.jpg" alt="" width="300" border="0" />

    </td>
    <td border="0" cellspacing="0" cellpadding="0">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard9.jpg" alt="Limited time only. Gear up for the survivor 30th season premiere. SHOP NOW." width="300" border="0" />

    </td>
    </tr>
    <tr>
    <td border="0" cellspacing="0" cellpadding="0">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard10.jpg" alt="Game of Thrones Hand of the King pin." width="300" border="0" />

    </td>
    <td border="0" cellspacing="0" cellpadding="0">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard11.jpg" alt="" width="300" border="0" />

    </td>
    </tr>
    <tr>
    <td border="0" cellspacing="0" cellpadding="0" valign="top">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard12.jpg" alt="" width="300" border="0" />

    </td>
    <td border="0" cellspacing="0" cellpadding="0" valign="top">

    <img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard13.jpg" alt="Entourage Suits Suck men's T-shirt." width="300" border="0" />

    </td>
    </tr>
    </table>
</td>
</tr>
<tr>
<td border="0" cellspacing="0" cellpadding="0" valign="top">

<img style="display: block; border: 0;margin:0px; padding:0px;" src="http://img.ed4.net/deliveryagent/HBO/2015/Feb/20150224/postcard14.jpg" alt="Shop Now." width="600" border="0" />

</td>
</tr>
</table>
</td>
</tr>
</table>

Thanks!