Class B

Smartphone & Tablet NBTC Certification

Smartphones and tablets sold in Thailand require Class B (Certification) — the highest NBTC approval category — for every cellular technology they support. Class B applies uniformly across all cellular standards and frequency bands, regardless of generation: GSM, WCDMA, LTE, and 5G NR are all Class B. The certification covers the complete device including any co-located Wi-Fi or Bluetooth radios.

Why Smartphones and Tablets Require Class B

Class B (Certification) applies to telecommunications and RF equipment that operates on licensed spectrum — frequency bands allocated to mobile network operators. Because smartphones and tablets transmit on the same frequencies as public mobile networks, they are subject to the most stringent level of NBTC review, which includes independent laboratory testing against applicable technical standards and full NBTC authority evaluation before approval is granted.

Certification Requirements

All frequency bands listed below require Class B certification. The applicable standard depends on the cellular technology. Smartphones and tablets supporting multiple standards require compliance with each applicable standard — NBTC issues a single certificate covering all technologies.

GSM — NBTC TS 1004-2560

Frequency Band	Certification
880–960 MHz	Class B
1710–1880 MHz	Class B
1850–1990 MHz	Class B

WCDMA — NBTC TS 1015-2560

Frequency Band	Certification
824–894 MHz	Class B
880–960 MHz	Class B
1710–1880 MHz	Class B
1920–2170 MHz	Class B

LTE — NBTC TS 1027-2560

Frequency Band	Certification
703–803 MHz	Class B
824–894 MHz	Class B
880–960 MHz	Class B
1710–1880 MHz	Class B
1920–2170 MHz	Class B
2300–2400 MHz	Class B
2496–2960 MHz	Class B
5150–5925 MHz	Class B

5G NR — NBTC TS 1036-2563

Frequency Band	Certification
703–803 MHz	Class B
824–894 MHz	Class B
880–960 MHz	Class B
1710–1880 MHz	Class B
1920–2170 MHz	Class B
2300–2400 MHz	Class B
2496–2960 MHz	Class B
24250–27500 MHz	Class B

A single NBTC application covers all cellular standards and bands in the device. NBTC issues one certificate, and the certification class is determined by the highest applicable class — Class B in all cases for cellular-enabled devices.

What This Covers

This page covers smartphones and tablets as consumer end-user devices. Typical products include:

Android and iOS smartphones (all generations)
LTE and 5G tablets
Cellular-enabled smartwatches and wearables
Mobile hotspot devices and portable routers with cellular connectivity
Feature phones with GSM or WCDMA connectivity

Cellular modules and infrastructure: If your product is a cellular module, modem, or base station rather than a consumer end-user device, see the Cellular Equipment page for requirements specific to that product category.

Required Documents

Technical specification / datasheet with wireless communication details
Product photographs (exterior and label)
Test reports from accredited laboratories outside Thailand — RF, Safety, and EMF/SAR as applicable
ISO/IEC 17025 accreditation certificate and laboratory scope
Authorised declaration (manufacturer or authorised representative)

Class B certification requires a local representative — a Thai juristic person holding a valid NBTC trade license and NBTC Supplier Code — to file on behalf of the overseas manufacturer. Zergo provides this as part of its certification service.

Estimated Timeline

Class B Certification:Approximately 6 weeks from submission

Cellular modules, modems, and infrastructure

Cellular Equipment

→

Wi-Fi-only devices — lower certification class

Wi-Fi Router & Access Point

→

Ready to certify your smartphone or tablet for Thailand?

Zergo manages the complete NBTC Class B certification process — from multi-standard document preparation to local representative filing and approval delivery.

View NBTC Certification Service →