Ok for MNC 2 and 3 digits, tested wit 208.10 and 310.028

openair-cn/MME_APP/mme_app_authentication.c

openair-cn/NAS/EURECOM-NAS/src/api/mme/mme_api.c

openair-cn/NAS/EURECOM-NAS/src/emm/Attach.c

...ECOM-NAS/src/ies/VoiceDomainPreferenceAndUeUsageSetting.c

openair-cn/NAS/EURECOM-NAS/tools/Makefile

openair-cn/NAS/EURECOM-NAS/tools/network.h

openair-cn/NAS/EURECOM-NAS/tools/ue_data.c

openair-cn/NAS/EURECOM-NAS/tools/usim_data.c

openair-cn/S6A/s6a_auth_info.c

openair-cn/S6A/s6a_up_loc.c

openair-cn/UTILS/conversions.h

openair-cn/UTILS/mcc_mnc_itu.c

openair-cn/UTILS/mme_config.c

openair-cn/UTILS/mme_config.h