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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!
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<indicator name="FireBrick">[[File:Menu-USBDongle.svg|link=:Category:FireBrick USB Dongles|30px|Back up to the FireBrick USB Dongles Category]]</indicator>
This page is also relevant to the FB2900
=ZTE MF823 Overview=
The ZTE MF823 is a 4G dongle that (as of 2017) is widely available at a good price. (Below £50
=Default settings and configs just work if NAT is acceptable=
*The FireBrick will give you internet access over the dongle
=ZTE MF823, Firebrick and No NAT=
In its default state, the ZTE MF823 dongle will give internet access and the FireBrick can also be configured to use the dongle as a backup internet connection if your main connection goes down. However, when used with a Data SIM from AAISP you may want to take advantage of the static IP and routed blocks of IPv4 addresses. In these cases you don't want the dongle to do any NAT.
==Changing the ZTE MF823 to 'serial modem' mode==
Warning: This is still in progress and has not been fully tested, and as such may not work. Tests were performed on an unlocked
There have been reports of this procedure not working on O2 branded dongles, causing the network lock which was previously not set to be applied, so proceed at your own caution if using a branded dongle. Networks often customise the firmware of these devices so they may behave in a completely different manner with these firmware modifications.
The ZTE823 works as an Ethernet device by default, it is possible to change the mode so that it works as a modem. The idea here is that rather than the dongle NATing the connection it can be a modem and the FireBrick will be given the public WAN IP address directly.
One caveat of modem mode
==Switching to 'Download' Mode==
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