1. Whether registered or non registered Sim. Just put it in any phone.
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2. Dial *474*1#
If it is supported sim, you will see a message like insufficient balance to activate the plan.
If not, you will see a message that – You are not qualified for this offer.
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Note: Not all sellers will allow testing before buying the SIM. Just make sure it is Smart Connect new SIM and take note of that tinny white color in vertical, it’s very necessary.