@CAP-33 Great :-)
Here you are a more elegant (and easily scriptable) way.

Run the below mentioned commands either on the Serial Console or connect with ssh your Omega's AP (192.168.3.1 by default):

# Omega2 v0.2.0 b186 root@Omega-5533:~# uci set network.wwan.hostname='your_client_hostname' root@Omega-5533:~# uci commit network # Check the result (this is not mandatory of course): root@Omega-5533:~# uci show network network.loopback=interface network.loopback.ifname='lo' network.loopback.proto='static' network.loopback.ipaddr='127.0.0.1' network.loopback.netmask='255.0.0.0' network.globals=globals network.globals.ula_prefix='fd1d:48c4:7633::/48' network.wlan=interface network.wlan.type='bridge' network.wlan.proto='static' network.wlan.ipaddr='192.168.3.1' network.wlan.netmask='255.255.255.0' network.wlan.ip6assign='60' network.wan=interface network.wan.ifname='eth0' network.wan.proto='dhcp' network.wwan=interface network.wwan.ifname='apcli0' network.wwan.proto='dhcp' network.wwan.hostname='your_client_hostname' # release (with USR2) the lease root@Omega-5533:~# kill -USR2 `pidof udhcpc` # renew (with USR1) the lease root@Omega-5533:~# kill -USR1 `pidof udhcpc`

Good luck!