International Roaming of 3G Enabled Handset & SIM to 3G Network

[khurrambilal01]

Hi experts,
I have some questions related to international roaming,

Scenario:
If UE is 3G enabled and moves to another country where there is only one 3G Operator and rest three operators are 2G only,

Case I:
If Roaming priority (with Home Operator of UE) is same for all operators,
1) Then would this roamer successfully roam to 3G network or 2G network?

Case II:
If 3G operator has lowest priority in roaming partnership (with Home Operator of UE) as compared with all other 2G operators
2) Still the roamer would roam to 3G operator?

Case III:
If 3G operator has no roaming agreement (with Home Operator of UE)
3) Then would UE roam to 3G Operator or not?

Thanks for sharing knowledge!

[khurrambilal01]

Hi experts,
Can anyone from International roaming team can help me out?
Thanks!

[khurrambilal01]

Seems no body has expertise in International Roaming?

[banisha]

This is written in 3GPP specs 34.123-1

"Automatic Network Selection Mode Procedure:
The MS selects and attempts registration on other PLMNs, if available and allowable in the following order:
i) HPLMN (if not previously selected);
ii) Each PLMN in the "User Controlled PLMN Selector with Access Technology" data field in the SIM (in priority order);
iii) Each PLMN in the "Operator Controlled PLMN Selector with Access Technology" data field in the SIM (in priority order);
iv) Other PLMN/access technology combinations with received high quality signal in random order;
v) Other PLMN/access technology combinations in order of decreasing signal quality."

Hope this helps!
Cheers