Older CDMA Handsets Require Firmware Update to Use with OMH RUIM

Older CDMA Handsets Require Firmware Update to Use with OMH RUIMIt seems that controversy is not leaving CDMA. Now with the entry of OMH handsets, all operators like Reliance, Tata Tele and MTS introduced OMH RUIM cards for all new subscribers.

But these OMH RUIM cards are not compatible with older handsets, until you make a firmware update.The problem is while you are getting a RUIM replacement for your basic phone, you will not get basic RUIM, as it is getting obsolete.

While you put OMH RUIM on your older phone – it will show ‘Invalid RUIM

But this problem is not happening with all old phones; I tested with Haier D1600 which came with Indicom connection. The handset does not accept Tata Indicom RUIM card and shows – MIN out of limit, please insert valid RUIM.

But I also tried with Haier C5000, which is not an OMH handset, but unlocked to use any CDMA RUIM. This phone does read OMH RUIM as like basic RUIM. So it depends on your phone’s firmware – if it is outdated you cannot use OMH RUIM wit it.

OMH handsets are backwardly compatible with basic and OMH RUIM, but data services including BREW is disabled on basic RUIM.I checked out MTS Store, and they also told me same story is also happening with MTS.But they give me a solution – you just have to visit Haier mobile service center and update your phone with latest software (firmware).

Now the solution is simple and easy but does not come free of cost as those older handsets do not have warranty and thus to update firmware you have to shell out another 100 bucks.

You can do the firmware upgrade at home if you have that USB data cable for Haier or other brands’ mobile phone. Connect the phone to PC and run the firmware updater. It is easy for geeks but not for general users who may not have a computer and have no idea where to get the firmware, to add more they even do not have the data cables for the phone.

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23 Comments on "Older CDMA Handsets Require Firmware Update to Use with OMH RUIM"


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Sheetal Soni
July 15, 2017 2:58 pm 2:58 PM

My Samsung cdma phone showing the error ie. Card disable cha 20700 hw 219.5. What does it mean and what should I do for this

January 11, 2015 6:40 pm 6:40 PM

using htc desire xc dual sim…. just ported from mts to rel cdma… default operator showing is tata docomo.. there is no option to manually change network.. i am unable to use EVDO as def. n/w operator tata docomo doesnt support it….. when i try to open UIM toolkit for my sim, its says not available or supported… can any one help?.. i tried calling cc, but dey aint got any clue…

Pameeka (Pandurangan K)
December 31, 2013 6:17 pm 6:17 PM

Good info. I have 2 CDMA (old) mobiles – Nokia 6275i and LG-RD3510, both supplied by Reliance, in good working condition. Can they be used with BSNL CDMA RUIM? When BSNL RUIM is inserted in LG-RD3510, it instructs “Contact Reliance Customer Care” and in Nokia 6275i, it does not boot at all. Can these mobiles be activated with BSNL RUIM with any updates? If so, please high light the procedure. (I have Computer and necessary connecting cables for both the mobiles. ) Thanks in advance.

December 31, 2013 6:46 pm 6:46 PM

that means your device is locked to reliance cdma network and needs to be unlocked prior to using another cdma RUIM. Search on google how to unlock your device and you would find tons of info.