I have found that while benchmarking the no. of samples collected from GSM 900 are less than the no. of samples collected from GSM 1800. The difference is almost double.
Drive route is same.
Handsets made is same.
Can anybody tell me its reason.
Maybe your system gives preference to 1800 cells, eg, if your 1800 cells belong to LAYER 2 and 900 cells belong to LAYER 3 in HCS, then the 1800 cells will always be preferred.
Check your HCS settings to see if this is the case.