Looking at the support FAQs for the Tablo (an Excel clone?) via
http://www.box.co.uk/Tablo_7_Tablet_with_Capacitive_Multi-To_1156442.html it says:
Q. Can I use 3G to access the internet whilst on the move?
A. Tablo does not have 3G built in. To use 3G you may be able to set-up tethering and use your mobile phone as a WiFi hotspot if you have a smartphone and the correct tariff. Contact your mobile provider for more information on setting this up. Tablo also supports the following Huawei WCDMA 3G Dongles - E220/E230/E180/E1550/E1630/E1750/E1782/E1820. We will update this list as we test more dongles.
So, maybe, it's a Huawei 'thing'.
The FAQ also says:
Q. Will Android 3 (Honeycomb) or 4 (Ice Cream Sandwich) be available for Tablo?
A. Android 3 has now been replaced by version 4 so you will not see Honeycomb on Tablo. However it is possible that Android 4 could be released for Tablo at some point in the future. Stay tuned for more information.
Maybe they will, maybe they won't, maybe they don't like to say 'No!'
Excel