# GSM/GPRS M66 ## Summary - Quad-band GSM/GPRS module - 17.7mm × 15.8mm × 2.3mm - 1.3g - Max. data rate: 85.6Kbps - SMT form factor - LCC castellation packaging - Extended temperature range of -40°C to +85°C ## Key features - Supports frequency bands 850/900/1800/1900MHz - Easier soldering process with LCC package - Power consumption as low as 1.3mA - GPRS Multi-slot Class 12 - Supports BT 3.0 - Supports QuecFOTA - Supports Quectel OpenCPU - Embedded internet service protocols, multiple sockets and IP addresses ## Overview The M66 is a quad-band GSM/GPRS 2G module measuring 17.7mm × 15.8mm × 2.3mm which uses LCC castellation packaging. Based on the latest 2G chipset, it is optimized for data, SMS and audio transmission, and is designed for low-power IoT use cases that operate in harsh conditions. The M66 uses surface mounted technology, making it ideal for large-scale manufacturing, which can have strict requirements on cost and efficiency. The M66’s ultra-compact profile makes it particularly suited to size-sensitive applications, and the module can serve a range of applications such as wearable devices, automotive, PDAs, asset tracking, POS, smart metering and telematics. ## Product Brochure [Download Quectel_Product_Brochure_V8.6.pdf](https://www.quectel.com/content/uploads/2026/05/Quectel_Product_Brochure_V8.6.pdf) ## Documentation and resources - **Application Note** - [Quectel_MC60&M66&M66 R2.0_BT_Application_Note_V1.4](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 417.76 KB - [Quectel_M66_AT_over_SMS_Application_Note_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 283.78 KB - [Quectel_GSM_RF_Test_Application_Note_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 4.23 MB - [Quectel_GSM_SMTP_AT_Commands_Manual_V1.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 955.07 KB - [Quectel_GSM_FTP_AT_Commands_Manual_V1.5](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 391.13 KB - [Quectel_GSM_STK_AT_Commands_Manual_V1.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 1.16 MB - [Quectel_GSM_Recording_AT_Commands_Manual_V3.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 569.85 KB - [Quectel_GSM_QuecCell_AT_Commands_Manual_V1.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 638.61 KB - [Quectel_GSM_FILE_AT_Commands_Manual_V1.5](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 1.08 MB - [Quectel_GSM_MMS_AT_Commands_Manual_V1.3](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 461.80 KB - [Quectel_GSM_RTC_Application_Note_V1.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 457.71 KB - [Quectel_GSM_MQTT_Application_Note_V1.3](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 667.41 KB - [Quectel_GSM_HTTPS_Application_Note_V3.4](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 242.52 KB - [Quectel_RF_Layout_Application_Note_V2.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 909.43 KB - [Quectel_GSM_QuecFOTA_Application_Note_V3.4](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 365.53 KB - [Quectel_GSM_TCPIP_Application_Note_V1.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 1.38 MB - [Quectel_GSM_TCP(IP)_Recommended_Process_V2.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 253.35 KB - [Quectel_GSM_SSL_Application_Note_V3.4](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 349.95 KB - [Quectel_GSM_SMTPS_Application_Note_V3.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 651.82 KB - [Quectel_GSM_PPP_Application_Note_V1.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 1.66 MB - [Quectel_GSM_UART_Application_Note_V1.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 947.99 KB - [Quectel_GSM_STK_BIP_Application_Note_V3.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 1.14 MB - [Quectel_GSM_MUX_Application_Note_V1.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 930.57 KB - [Quectel_GSM_Jamming_Detection_Application_Note_3.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 546.28 KB - [Quectel_GSM_eCall_Application_Note_V1.3](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 794.99 KB - [Quectel_GSM_DTMF_Application_Note_V1.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 627.97 KB - [Quectel_GSM_Audio_Player_Application_Note_V3.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 854.93 KB - [Quectel_GSM_ATC_Application_Note_V1.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 1.19 MB - [Quectel_GSM_Module_Digital_IO_Application_Note_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 395.48 KB - **AT Commands Manual** - [Quectel_M66_AT_Commands_Manual_V2.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 1.24 MB - **EVB Kit** - [Quectel_GSM_EVB_User_Guide_V3.4](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 2.97 MB - **Hardware Development Resources** - [Quectel_M66_Hardware_Design_V1.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 2.59 MB - [Quectel_M66 R2.0&M66_Difference_Introduction_V1.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 360.96 KB - [Quectel_M65&M66_Compatible_Design_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 684.19 KB - [Quectel_BC65&BC66&BC68&M66_Compatible_Design_V1.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 699.54 KB - **ToolKit** - [QFlash_V8.0_EN](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 326.70 MB - [QMulti_DL_CMD_V4.4_EN](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 178.96 MB - **User Guide** - [Quectel_Embedded_GSM_Antenna_User_Guide_V1.2](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fgsm-gprs-m66%2F) - File Size: 740.06 KB ## Related products ### [YE0013CA 4G terminal mount rubber monopole external antenna](https://www.quectel.com/product/ye0013ca-4g-terminal-mount-antenna/) ![YE0013CA 4G terminal mount rubber monopole external antenna](https://www.quectel.com/content/uploads/2024/09/YE0013CA-side-view-1-e1727273398256.png) ### [YF0006PA 4G adhesive mount FPC + cable monopole embedded antenna](https://www.quectel.com/product/yf0006pa-4g-fpc-antenna/) ![YF0006PA 4G adhesive mount FPC + cable monopole embedded antenna](https://www.quectel.com/content/uploads/2024/03/YF0006PA-700x520-1.png) ### [YF0028AA 4G adhesive mount FPC + cable dipole embedded antenna](https://www.quectel.com/product/yf0028aa-4g-adhesive-mount-antenna/) ![YF0028AA 4G adhesive mount FPC + cable dipole embedded antenna](https://www.quectel.com/content/uploads/2024/09/YF0028AA-side-view-e1727191903574.png) ### [YF0022DA 4G adhesive mount PCB + cable monopole embedded antenna](https://www.quectel.com/product/yf0022da-4g-pcb-antenna/) ![YF0022DA 4G adhesive mount PCB + cable monopole embedded antenna](https://www.quectel.com/content/uploads/2024/03/YF0022DA-800x522-1.png) ## Also of interest - [2G/3G modules](https://www.quectel.com/2g-3g-iot-modules/) - [LPWA BC65 NB-IoT](https://www.quectel.com/product/lpwa-bc65-nb-iot/) - [GSM/GPRS/GNSS MC60](https://www.quectel.com/product/gsm-gprs-gnss-mc60/)