In India phone bands are 900 and 1800, in United States 850 and 1900. Your phone is not defective at all, I repeat this change your csc to US and firmware to United States or CSC that uses the same bands used here in the United States, your India firmware is looking for India phone bands not United States ones. Your India firmware is tailored to India broadcast wavelengths the best officially licensed and to much lesser extent non India phone licensed bandwidths. This comes up quite a bit with pacific rim made phones that are tailored to the pacific rim countries and then sold here in the United States and have connection issues , no 5G, etc. This is not the case with Samsung Galaxy phone you have. I already walked one person from India with a United States phone setup to changing it to an India phone setup, your's the reverse of this , this was on a different forum yet a Samsung Galaxy phone. Cheers 3Fees
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