Hi Emmanuel,
Yes, you can write data to ThingSpeak channels using UMTS (Universal Mobile Telecommunications System) technology, which is a 3G technology, instead of the older GSM/GPRS (2.5G) technology. The SIMCOM 800F module, however, is primarily a GPRS module and does not support 3G/UMTS. If you want to use 3G/UMTS, you would need a module that supports these technologies, such as the SIMCOM 5320 or similar modules that are specifically designed for UMTS.
You will need to connect your 3G module to your microcontroller or development board and ensure you have a valid SIM card with a data plan that supports 3G/UMTS networks.
Use AT commands to configure the module and establish a connection to the UMTS network. This will involve setting up the APN and starting a data connection. Once connected, you can send HTTP requests to ThingSpeak to update your channel.
Hope this helps.
