In the OMH ecosystem, the complete configuration settings to support operator and subscriber identification is shifted from the handset to Removable User Interface Modules (R-UIMs) card, commonly known as OHM SIM card. "Earlier only the voice and SMS were provisioned on the SIM card. By moving the network settings for data onto the SIM card, the handset is made operator neutral," explains Sibal.
Qualcomm provides the technology and the chip-sets for OMH. "Qualcomm's
chip-set QCS1010 onwards support OMH," shares Anil Kaushik, executive vice president, Fly Mobile. “Handsets using Qualcomm's OMH chip-sets are basically the OMH compliant handsets as they are capable of reading the network settings on the OMH SIM card," he adds.
"If you have a non OMH SIM card-based handset, you can change from one
CDMA operator to the other," explains Vikas Jain, business director,
Micromax. "But you will be able to access only the voice and SMS service
of the operator. All the data applications will need manual configurations
and can be tedious at times," he explains. Also, the handsets were locked
by the operators which made it difficult to switch the operator and have
the same handset.
The OMH handset is backward compatible and can work with a non OMH SIM
card. Similarly, an OMH SIM can work with a non-OMH handset. You can slide
in any operator's SIM in any handset and all the configuration settings
for voice and data will be done automatically.
