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About Us

As Internet of Things (IoT) becomes increasingly popular, more and more devices, including open (SIM free) devices that uses cellular module, are expected to be connected to a carrier’s network.

To help promote such devices to a wider audience. To enable an ever easier connection to our network.

Bearing in mind the goals above, we provide all the necessary information to conduct our connectivity verification (IOT: Interoperability Testing) on this site.

  • ※A part of this site requires member registration to be accessed.
  • ※The information provided on this site does not guarantee the quality of a product and its functions. For questions regarding a product’s function and quality, please directly inquire to the manufacturer of the product.
IOT Goals


  1. ①:Products that have passed IOT (IOT-verified products) are listed here
  2. ②:Products offered by KDDI are listed 「here」 (in japanese only)
  3. ③:Customers who wish to use IOT-verified modules are advised to read the Guideline for Embedding Communication Module~KDDI LTE Network Specification Outline and Legal Compliance~ available in our Member's Page

Connectivity Verification (IOT : Inter-Operability Testing)

IOT is a test to confirm the connection compatibility between a manufacturer’s product and KDDI’s network.

Test Outline

1 Pre-IOT Tests conducted using simulator
2 IOT-L (Lab Test) Test(s) conducted in KDDI's lab (※1)
3 IOT-F (Field Test)(※2) Test(s) conducted in KDDI's commercial network. (Parts of the test are conducted using simulator)
  1. ※1: KDDI's lab is located in Tama, Tokyo.
  2. ※2: Technical Regulations Conformity Certification or Attestation of the Construction Design of Specified Radio Equipment is required to conduct field test.

IOT Flow

IOT Flow IOT Flow

LTE Network Architecture

As of now, KDDI’s connectivity verification is only intended for LTE network. As such, the information provided on this site is only for LTE system. Please refer to the image below for our network architecture outline.

LTE Network Architecture
Term OfFicial Name Remarks
UE User Equipment Device used by the end user
eNB Evolved Node B LTE network base station
SGW Serving Gateway User data (packet) relay server
PGW Packet Data Network Gateway Outer network data (packet) relay server
MME Mobility Management Entity Network signaling control server
HSS Home Subscriber Server Subscriber control server
IMS IP Multimedia Subsystem Voice and SMS control server
PCRF Policy and Charging Rules Function Communication policy and charging control server
e911 LCS Enhanced 911 Location Service Emergency call location positioning server
INET Internet Internet, World Wide Web

Basic Requirement for Connection

To connect to our network, your product shall comply with 3GPP/RFC specifications and fulfill the following requirements.

Category Requirements Remarks
(E-UTRA band)
LTE 2.1GHz (B1)
800MHz (B18/B26)
1.8GHz (B3)
1.5GHz (B11)
700MHz (B28)
3.5GHz (B42)
Emergency call uses SUPL2.0 protocol.

LPWA (LTE-M) uses 800MHz (B18/26).

LTE anchor for 5G uses B1 and B3.

5G FR1(n77)

Supported system Data communication LTE / 5G UMTS/GSM is not supported,
CDMA2000 is outside the scope of IOT.
LPWA is supported only LTE-M.
Voice call VoLTE CS call (CDMA/UMTS/GSM) is not supported.
VoLTE is not supported in LPWA (LTE-M).
SMS SMS over IMS Excluding LPWA (LTE-M)
SMS over SGs Only for LPWA (LTE-M)
SIM Card LTE / 5G Nano SIM Card(4FF) Voice call requires Nano SIM Card(4FF)

Products that comply with standard specifications still may not connect correctly with our network. Therefore, we strongly recommend conducting connectivity verification to avoid problems.

  • Note that our network behavior is subject to change in the future due to the network parameter update and so on.
  • You can apply for IOT by clicking the Apply for IOT button below.If you are not a registered member, please register first by clicking the Member Registration button below.