# Push To Talk Over Cellular Radios | LTE 4G Devices
Communication is essential for any team, especially for those who work in the field, such as construction, security, transportation, and hospitality. However, traditional communication methods, such as phone calls, text messages, and emails, may not be the most efficient and reliable for these teams. They may require multiple devices, incur high costs, and suffer from poor signal quality and coverage.
That's why many teams are switching to push-to-talk over cellular (POC) radios, also known as LTE radios or 4G radios. These are modern devices that use 3G/4G/LTE networks to provide instant and clear voice communication through a simple push of a button. They also offer various features and benefits that can enhance the team's productivity, safety, and collaboration.
In this article, we will explain what POC radios are, how they work, and what advantages they have over traditional communication methods. We will also provide some tips on how to choose the best POC radio system for your needs.
## What are POC radios?
POC radios are devices that use cellular networks to enable two-way voice communication among users. They are similar to walkie-talkies, but they do not rely on radio frequencies or dedicated infrastructure. Instead, they use SIM cards and cellular data to connect to the network and transmit voice and data.
POC radios have a PTT (push-to-talk) button that allows users to initiate and end calls with a single press. Users can communicate with one or more users in a group, depending on the settings and the app they use. POC radios can also support other functions, such as text messaging, GPS tracking, video streaming, and emergency alerts.
POC radios can be used with any compatible device, such as smartphones, tablets, or laptops. Users can either download a POC app on their device or use a dedicated POC device that has the app pre-installed. Some POC devices also have a rugged design and a large battery capacity to suit the field environment.
## How do POC radios work?
POC radios work by using cellular networks to transmit voice and data over the internet. They use a technology called VoIP (voice over internet protocol), which converts voice signals into digital packets and sends them over the network. The packets are then received and converted back into voice signals by the receiver.
POC radios require a SIM card and a cellular data plan to access the network. They can use 3G, 4G, or LTE networks, depending on the availability and the speed. They can also use Wi-Fi networks as an alternative or a backup option.
POC radios also require a POC app or software to enable the communication. The app or software acts as a platform that connects the users and manages the calls. The app or software can also provide additional features, such as group management, call recording, location sharing, and encryption.
## What are the benefits of POC radios?
POC radios have many benefits over traditional communication methods, such as:
- Nationwide coverage: POC radios can provide nationwide coverage, as long as there is a cellular network available. Users do not have to worry about the distance or the terrain that may affect the signal quality and the coverage. Users can also communicate across different countries and regions, as long as they have a compatible SIM card and a data plan.
- Clear audio: POC radios can provide clear and crisp audio, even in noisy or low-signal environments. POC radios can also support noise cancellation, echo cancellation, and automatic volume adjustment to enhance the audio quality. Users can also use earpieces, microphones, or speakers to improve the sound quality and comfort.
- Data transmission: POC radios can also transmit data, such as text messages, images, videos, and location information. Users can share important information and documents with their team members, as well as monitor their location and status. Users can also use encryption and compression to ensure the security and efficiency of data transmission.
- Additional features: POC radios can also offer additional features that can improve the communication and productivity of the team, such as emergency alerts, voice recording, group management, and offline mode. Users can also customize the settings and the functions of the POC radios according to their preferences and needs.
- Reduced costs: POC radios can also reduce the costs of communication, as they do not require any additional infrastructure or equipment. Users can use their existing devices and data plans, or choose a dedicated POC device and a data plan that suits their budget. Users can also save on the maintenance and repair costs, as POC radios are more durable and reliable than traditional radios.
## How to choose the best POC radio system?
Choosing the best POC radio system depends on several factors, such as:
- App features: The app features are the software functions that enable the communication and the data transmission. Users should look for an app that is easy to use, compatible with their device and operating system, and has regular updates to ensure security and performance. Users should also look for an app that has the features that they need, such as voice quality, data transmission, and additional features.
- Device specifications: The device specifications are the hardware characteristics that affect the performance and the durability of the POC radio. Users should look for a device that has a long-lasting battery, a suitable screen size and resolution, enough memory and storage, and a durable and reliable design. Users should also look for a device that has a touch-screen feature, a water-resistant feature, and an expandable storage feature.
- Hardware: The hardware is the additional equipment that users can use to enhance their POC radio system. Users should look for hardware that is compatible with their device and app, such as earpieces, microphones, speakers, and chargers. Users should also look for hardware that is durable and easy to use, such as repeaters, routers, and antennas.
- Support services: The support services are the assistance and guidance that users can receive from the provider and the seller of the POC radio system. Users should look for support services that are responsive and helpful, such as customer service, technical support, warranty, and repair. Users should also look for support services that are available through various channels, such as phone, email, chat, and social media.