Deferent between local access to home network or roamer

[almoqbali36]

Dear
is their any difference in accessibility to the network if you are using home network SIM card or roaming SIM card?

Best regards
Rashid

[almoqbali36]

dear
no one has an idea?

[almoqbali36]

is there any timer to search for home network

[linhhy]

is there any timer to search for home network

Some information for you:
National Roaming

The MS can select and register on a PLMN of its home country other than its home PLMN if national roaming is permitted. In this case, the MS shall periodically attempt to obtain service on its home PLMN. For this purpose, a value T minutes may be stored in the SIM, T is either in the range 6 minutes to 8 hours in 6 minute steps or it indicates that no periodic attempts shall be made. If no value is stored in the SIM, a default value of 30 minutes is used.

The attempts to access the home PLMN are performed as specified below:
◾The periodic attempts are only performed in automatic mode when the MS is roaming in its home country.
◾After power on, a period of at least 2 minutes and at most T minutes is elapsed before the first attempt is made.
◾The MS makes an attempt if it is on the visiting PLMN at time T after the last attempt.
◾Periodic attempts are only to be performed by the MS while in idle Mode.
◾If the home PLMN is not found, the MS remains on the visiting PLMN.

[linhhy]

Dear
is their any difference in accessibility to the network if you are using home network SIM card or roaming SIM card?

Best regards
Rashid

I think there're no difference in 2 cases except the authentication procedure, which roaming network need to negotiation with home network.

[srilasitha]

Some information for you:
National Roaming

The MS can select and register on a PLMN of its home country other than its home PLMN if national roaming is permitted. In this case, the MS shall periodically attempt to obtain service on its home PLMN. For this purpose, a value T minutes may be stored in the SIM, T is either in the range 6 minutes to 8 hours in 6 minute steps or it indicates that no periodic attempts shall be made. If no value is stored in the SIM, a default value of 30 minutes is used.

The attempts to access the home PLMN are performed as specified below:
◾The periodic attempts are only performed in automatic mode when the MS is roaming in its home country.
◾After power on, a period of at least 2 minutes and at most T minutes is elapsed before the first attempt is made.
◾The MS makes an attempt if it is on the visiting PLMN at time T after the last attempt.
◾Periodic attempts are only to be performed by the MS while in idle Mode.
◾If the home PLMN is not found, the MS remains on the visiting PLMN.

Do you have any reference on how to change Time T periodic search timer in local roaming with an OTA upgrade & any SIM requirement

[almoqbali36]

if I attached to other PLMN and then come back to my country how fast I will select my home PLMN. is it possible to select my home PLMN direct even if the other PLMN signal is available.
in other word if Home PLMN and other PLMN are overlapping and I already attached to other PLMN is possible to select my home PLMN automatically?

[srilasitha]

For local roaming scenario (two PLMNs but with same MCC ) then home PLMN search according to SIM setting interval (6min to 30 min) in idle mode or 2 min after swtiched on

[linhhy]

Do you have any reference on how to change Time T periodic search timer in local roaming with an OTA upgrade & any SIM requirement

I/ve never seen this timer in logfile. I think it is deployed by SIM operator or by handset manufacture.

[srilasitha]

I/ve never seen this timer in logfile. I think it is deployed by SIM operator or by handset manufacture.

This is in SIM & not available in a DT trace, may be visible in qualcom signal trace

My question " Is this SIM timer can be change with an OTA upgrade"