How UE decides the acquisition order preference in msm7x72/7x27A/8x55

Acquisition order preference is the priority order of the RAT on which UE decides to camp when user selects automatic network selection.


For 9K:

The RAT priority order on 9K using "\sd\rat_acq_order" file in EFS. This is mentioned in 80-VT878-1.
So, It means when Automatic mode is set, then the acquisition will be as per the RAT priority order in EFS file mentioned above location.



For Other chipsets supporting GSM and WCDMA:

The RAT priority depends on the NV item NV_ACQ_ORDER_PREF_I(848). Below are the supported values for NV 848.



/* Determine acquisition order automatically */
#define NV_ACQ_ORDER_PREF_AUTOMATIC ((nv_acq_order_pref_enum_type)0)
/* Acquisition order is GSM first, followed by WCDMA */
#define NV_ACQ_ORDER_PREF_GSM_WCDMA ((nv_acq_order_pref_enum_type)1)
/* Acquisition order is WCDMA first, followed by GSM */
#define NV_ACQ_ORDER_PREF_WCDMA_GSM ((nv_acq_order_pref_enum_type)2)