Why 6s Upi payments not happening

iPhone 6s, iOS 12

👉 Check your iPhone type & iOS version -> Go to: Settings -> General -> About.

If you have iPhone 6S, it is possible to use UPI, but you need to update your iPhone to iOS 15.7.5.

See this Apple article: iPhone models compatible with iOS 15.5 -> iPhone models compatible with iOS 15.5 – Apple Support (UK)

You need about 6 GB device storage and good Service and/or Wi-Fi.

If they are On, turn Off Hotspot & VPN.

Charge the battery > 70%.

See the following Apple articles:

Update your iPhone, iPad, or iPod touch

Update your iPhone, iPad, or iPod touch - Apple Support (IN)

If your iPhone, iPad or iPod touch won’t update

If your iPhone, iPad, or iPod touch won't update - Apple Support

You can do the update via PC, see this Apple article: Update software on iPhone, iPad or iPod touch in iTunes on PC

Update software on iPhone, iPad or iPod touch in iTunes on PC – Apple Support (UK)

If you have a Mac see this Apple article: Update your iPhone, iPad, or iPod touch with the Finder

Update your iPhone, iPad, or iPod touch with the Finder - Apple Support

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IF iOS 12.5.7 is the latest iOS security update for your iPhone, then you can’t update to a higher iOS (13 and later) and you can't use UPI.