GSM-Forum - View Single Post - 'Invalid UIM' in ZTE818D/MTS BLAZE Dual SIM Mobile

nag2014 · 11-09-2014, 08:50

I am using a CDMA+GSM Dual Sim, Dual Standby Mobile Model ZTE 818D (Also called MTS Blaze 4.5). I use one MTS CDMA R-UIM and one AIRTEL GSM SIM in the Dual SIM Slots. The MTS CDMA UIM gets disabled often. It says UIM is invalid. Only after removing the MTS SIM and inserting the same after 24 Hours the UIM gets activated. But the phone immediately accepts yet another CDMA UIM without any fuss and rejects only the current UIM. Why the CDMA UIM gets disabled/locked/rejected often? Even after rebooting the MTS CDMA remains Invalid and is rejected. Next day only it accepts the MTS UIM. There is no problem with the AIRTEL GSM SIM Slot. I have another phone called ZTE919D (MTS Blaze 5.0) also. The same problem happens in both models. I am afraid I have wasted around Rs.20,000 in these phones. What may be the reason. What is the possible solution?

11-09-2014, 08:50	#1 (permalink)
nag2014 Junior Member Join Date: Nov 2014 Posts: 3 Member: 2289476 Status: Offline Thanks Meter: 0	'Invalid UIM' in ZTE818D/MTS BLAZE Dual SIM Mobile I am using a CDMA+GSM Dual Sim, Dual Standby Mobile Model ZTE 818D (Also called MTS Blaze 4.5). I use one MTS CDMA R-UIM and one AIRTEL GSM SIM in the Dual SIM Slots. The MTS CDMA UIM gets disabled often. It says UIM is invalid. Only after removing the MTS SIM and inserting the same after 24 Hours the UIM gets activated. But the phone immediately accepts yet another CDMA UIM without any fuss and rejects only the current UIM. Why the CDMA UIM gets disabled/locked/rejected often? Even after rebooting the MTS CDMA remains Invalid and is rejected. Next day only it accepts the MTS UIM. There is no problem with the AIRTEL GSM SIM Slot. I have another phone called ZTE919D (MTS Blaze 5.0) also. The same problem happens in both models. I am afraid I have wasted around Rs.20,000 in these phones. What may be the reason. What is the possible solution?