Comment 18 for bug 1499342

As I remember, my O2 card and my Simquadrat card in the past didn't do the automatic roaming, because the network was marked as illegal.
After manually choosing the network with my android mobile, the settings in the SIM card were updated and automatic roaming for the partner network (E-Plus for O2 and vice versa) enabled (the network was not illegal anymore).
Also I have noticed that the networks changed their names:
The O2 card now recognizes the e-Plus network as o2.de+
The Simquadrat card (used E-Plus network) now recognises O2 as sipgate+.

For those, who don't know: Simquadrat is a brand of the german provider sipgate and can be purchased via http://smqdr.at/9r2G66sa if you live in Germany. They are a virtual network provider, thus they do not own their own network, but use the network of e-plus and now also O2 via national roaming.
For internet they have also special APN settings, thus with the standard e-plus or O2 settings, you will not be able to use the internet and you have to add the APN manually.

This is my output from the operator scan:

phablet@ubuntu-phablet:~$ /usr/share/ofono/scripts/scan-for-operators /ril_0
Scanning operators on modem /ril_0...
[ /ril_0/operator/26203 ]
    Status = current
    Name = sipgate
    Technologies = gsm umts
    MobileNetworkCode = 03
    MobileCountryCode = 262

[ /ril_0/operator/26207 ]
    Status = available
    Name = sipgate+
    Technologies = gsm umts
    MobileNetworkCode = 07
    MobileCountryCode = 262

[ /ril_0/operator/26202 ]
    Status = forbidden
    Name = Vodafone.de
    Technologies = gsm umts
    MobileNetworkCode = 02
    MobileCountryCode = 262

[ /ril_0/operator/26201 ]
    Status = forbidden
    Name = T-Mobile D
    Technologies = gsm
    MobileNetworkCode = 01
    MobileCountryCode = 262

phablet@ubuntu-phablet:~$