US Unlocked S8 - not able to place calls in India - Samsung Galaxy S8+ Questions & Answers

Hi, I bought the Samsung S8 US Unlocked version from Bestbuy in US. I recently moved to India and when I tried Airtel or Jio Sim, I dont get the network and not able to place voice calls. However when I goto Network selection am able to see the right network selected (respectively for whick network's sim I used).
Can I use an US Unlocked S8 in India? If so, how to make it work. Am stuck, please help!!
Edit: 4g LTE is working, but not the calls. If I have the sim put in another phone, able to make calls. Not sure whats wrong in S8 with placing the calls when 4G LTE is working??

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Sotats said:
Hi all, has anyone here tried or been successful in getting the data or lte over voice calls with Verizon's S6 using Tmobile? I have Tmobile and trying to use my gf's unlocked Verizon Galaxy S6. Almost everything works fine except that while on voice call, the signal drops to 1x and I can not simultaneously use data or receive mms. Are there any fixes for this? Any help would be appreciated as she is planning to switch from Verizon to Tmobile and I would love to just reuse the phone on Tmobile.
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Click to expand...
Click to collapse
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