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How to:
Android: Settings App → About Phone → Status → SIM Status → Signal Strength
iOS: https://lifehacker.com/see-the-actual-signal-strength-on-your-iphone-or-androi-5929546
If the signals are not good,
Move towards a sky-facing area, such as near a window with no obstacles.
Change the current SIM telecom operator with the one that has better coverage in your area
Use a signal booster device
Alternate Approaches
Enable Jio Wifi calling.
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Two prerequisites for Jio Wifi calling
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You can use a landline phone instead of mobile phone.
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Desktop Agent-UI
Work from Home scenario is getting more prevalent these days. There are multiple ways agents can connect and received calls. They can receive calls through SIP channels (requires compliance with OSP guidelines) and they can receive calls directly on their mobile phone numbers (two-way call legs).
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