These were all taken from working IOT sensors that were upgraded to Worldwide connectivity to save us having variants

LTE EC25-E Mini PCIe Series EMEA/ South Korea/ Thailand/ India Variant 
EC25EFA-512-STD
  • Supports DFOTA
  • Supports DTMF
  • Supports MIMO
  • USB 2.0 high speed interface
  • Multi-constellation GNSS receiver available

Overview

Quectel EC25 Mini PCIe is a series of LTE Cat 4 module adopting standard PCI Express® Mini Card form factor (Mini PCIe). It is optimized specially for M2M and IoT applications, and delivers 150 Mbps downlink and 50 Mbps uplink data rates.

EC25 series Mini PCIe contains 14 variants: EC25-A Mini PCIe, EC25-ADL Mini PCIe, EC25-V Mini PCIe, EC25-AF Mini PCIe, EC25-AFDL (Data-only) Mini PCIe, EC25-AFX Mini PCIe, EC25-AFXD (Data-only) Mini PCIe, EC25-AU Mini PCIe, EC25-AUX Mini PCIe, EC25-J Mini PCIe, EC25-EU Mini PCIe, EC25-EUX Mini PCIe, EC25-E Mini PCIe and EC25-EM Mini PCIe. This makes it backward-compatible with existing EDGE and GSM/GPRS networks, ensuring that it can be connected even in remote areas devoid of 4G or 3G coverage.

EC25 series Mini PCIe supports Qualcomm® IZat™ location technology Gen8C Lite (GPS, GLONASS, BDS, Galileo and QZSS). The integrated GNSS greatly simplifies product design, and provides quicker, more accurate and more dependable positioning.

A rich set of Internet protocols, industry-standard interfaces and abundant functionalities (USB serial drivers for Windows 7/8/8.1/10/11, Linux, Android) extend the applicability of the module to a wide range of M2M applications such as industrial router, industrial PDA, rugged tablet PC, video surveillance and digital signage.