Vivo Y31e 4G Spotted on Thailand's NBTC Ahead of Launch

A new budget vivo phone, the vivo Y31e, has appeared in Thailand's NBTC certification database with model number V2661. The listing points to a 4G-only phone and reveals no specs. vivo has not announced it, but NBTC approval usually comes shortly before a launch in Thailand.

What the NBTC listing shows

• Name: vivo Y31e.
• Model number: V2661.
• Network: 4G (LTE), with no sign of 5G.
• Market: Thailand, since NBTC is Thailand's telecom regulator.

Certification listings like this one confirm a name and the radio bands, not the hardware. The chipset, battery, display, cameras and price are all unknown. A 5G phone under the Y31e name was reportedly seen in the Bluetooth SIG database in 2025 but never launched, so this V2661 model looks like a separate, 4G device.

Where the Y31e fits in the vivo Y31 family

The Y31 name already covers four phones in our database. One of them, the Y31d, is already a 4G model, which is the closest clue to what the Y31e might look like:

The Y31d uses the Snapdragon 6s 4G Gen 2 (21.88 on our SoC rating), a step below the 5G Snapdragon 4 Gen 2 (25.91) in the Y31 and Y31t. Every Y31 model so far has a battery of 6,500 mAh or more. We would expect the Y31e to follow that pattern and sit at the bottom of the range on price, but that is our reading, not a leak.

Why a 4G phone in 2026?

4G-only phones still sell in price-sensitive markets across South-East Asia, where buyers care more about battery life and price than 5G. Leaving out a 5G modem keeps the cost down, which is likely why vivo keeps 4G variants such as the Y31d in the range. For Indian buyers, a 4G phone makes less sense when 5G Y-series models like the Y31t are already sold here. Nothing so far suggests the Y31e is coming to India.

What's confirmed and what isn't

• Listed (NBTC): the vivo Y31e name and model number V2661, as a 4G device for Thailand.
• Reported (Bluetooth SIG, 2025): an earlier 5G Y31e that never launched.
• Our expectation: a budget phone with a large battery, priced below the other Y31 models.
• Not known: specs, price, launch date and any markets beyond Thailand.

Sources: originally reported by 91mobiles, which spotted the phone in Thailand's NBTC certification database.