It took me very long to look for those settings 😊😮
On network destinations choose access point, create a new access point manually.
The 1st should be the internet.
Connection name
Three
Data bearer
Packet data
Access point name
Three.co.uk
User name
None
Prompt password
No
Password
Do not enter any details
Authentication
Secure
Homepage
None
Use access point
Automatically
Then for the multimedia message:
Connection name
3mms
Data bearer
Packet data
Access point name
three.co.uk
user name
none
prompt password
no
password
do not add any details
authentication
secure
homepage
http://mms.um.three.co.uk:10021/mmsc
use access point
after confirmation
Then on advanced Settings:
Network type
IPv4
Phone Ip Address
Automatic
Dns Addresses
Automatic
Proxy Server Address
mms.three.co.uk
proxy port number
8799
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