Hello Munishsharma,
Welcome to the community!
@munishsharma wrote:...As per Oppo, these are the frequencies.
GSM: Bands 2/3/5/8 WCDMA: Bands 1/5/8 FDD-LTE: Bands 1/3/5/8 TD-LTE: Bands 38/40/41
...
Judging by those specifications, that phone has both of the compatible bands/frequencies for 2G (GSM) and only one compatible band/frequency for '3G' (WCDMA or UMTS). With regards to LTE, that phone does not have any compatible bands or frequencies. You can verify the compatible bands/frequencies here. So the phone should work on the '3G' network for data, however, coverage would depend on your location relative to the cellular towers. You can get an idea of your surrounding towers here.
In addition, you should also note that the different frequencies have varying characteristics. While the lower frequencies tend to travel farther and penetrate deeper than the higher frequencies (see graphic here), they also have less potential bandwidth capacity than the higher frequencies (see table here). Since your phone does not have all of the compatible bands/frequencies, it won't be able to access the potentially faster band 2 or 1900MHz.
Also, since that phone does not have any compatible LTE bands or frequencies, it will not be able to connect to that network.
Hope this helps 
Cheers
