Sim Card Registration failure

Any more inputs required ?

Somebody pls help

Hi paraho

Inter plmn reselection isn’t there and hence that option doesn’t seem to apply. Yes the coverage could be lower than competitor but I don’t see any reason why sim card reg fail shud come

It might be answer that you say the subscribers do not latch in automatic mode. If attempting to latch to the new (roam) network it could see these subs handsets as barred or stolen or not paid contract fees etc. This is potentially possible because of SIM Card Registration failed – which the subs authentication failed in that network.

This could be a commerical decision to force your HLR to agree to a roaming agreement (thus roaming traffic) on new network (new networks cost money, need traffic theirs or someone elses to pay for network). If other network is using (anti-) steering of roaming it could be they use subs handsets in auto roaming mode, lock auto selection to their network – does roaming network send welcome SMS maybe? Ask subs to check if they get SMS and is it still saved.

This maybe because you say when selected in manual mode subs have no problem getting back to your network (their home network). the auto mode is bypassed.

Maybe look at make/model of handsets or handsets with particular operating platform (symbian, etc) or where 2G or 3G handsets.

Also contact other network to find out how they organise roaming registration.

Could be in that border area the other network change some in BSS or something. I guess at that because I dont know your network or other network. So just give ideas.

subs not latch to our network when MS at border in our network but roam anyway. help pls advise

Paraho.

Sorry for the late reply

It was a wrong configuration of the competitor .They had enabled our NDC in their system and that’s why SIM card registration failure came

sam thanks for come back. NDC…mmm unusual to find this to be problem generate the SIM Card Registration Failure.

BR
paraHO

naveen

For GSM applications, a National Destination Code is allocated to each GSM PLMN. In some countries more than one NDC may be required for each GSM PLMN.

The composition of the MS international ISDN number should be such that it can be used as a global title address in the Signalling Connection Control Part (SCCP) for routing messages to the home location register of the MS. The country code (CC) and the national destination code (NDC) will provide such routing information. If further routing information is required, it should be contained in the first few digits of the subscriber number (SN).