185+ iOS apps curated and reviewed
If you already know GSM 3G M2M RTU, this is the deeper bench. 185+ gsm3 apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of May 2026.
This wireless security alarm system offers a compact and powerful solution for home protection. It sends SMS alerts and calls users during alarms, and allows remote arming/disarming via free calls. Features include multiple zones, customizable alarm texts, and temperature alerts.
This app provides a dedicated phone number for calls, texts, and voicemail, syncing across devices for seamless use anywhere. It offers advanced spam filtering, call forwarding, and searchable message history. Voicemails are transcribed for easy reading and can be sent to your email.
Design a custom phone case by selecting from a gallery of designs. Order your personalized phone mask directly through the app in just a few simple steps.
This app provides a mobile phone plan with reliable 5G coverage, enhanced security, and international perks. Manage your service, track data, and access customer support all within the application.
Manage your mobile service with ease. Activate new lines, switch between major US networks, and track usage in real-time. Offers plans for individuals and families, with international data options and 24/7 support.
Control access to doors and equipment remotely using a free phone call. This app allows scheduled gate opening and provides historical data access via USB. It's ideal for monitoring and managing remote outdoor cabinets and stations.
Easily manage your mobile and broadband plans. Track usage, view bills, top up accounts, and access exclusive offers. Set up and manage your broadband with helpful tools.
This app provides free wireless phone service, including a smartphone and monthly plan with unlimited talk, text, and data. Manage your account, check usage, purchase extra data, and activate international calling. Refer friends to earn rewards and shop for new devices and accessories.
This app enforces corporate security policies for businesses using Google Workspace. It allows IT administrators to manage device security, configure Wi-Fi, and deploy work apps. Enrollment is required if your company has mobile management set up.
This app provides free calling and texting services, allowing users to get a new phone number from the US, UK, or Spain. It offers free domestic and international calls, HD-quality audio, and free SMS messaging, working over Wi-Fi or cellular networks.
Manage your wireless plan effortlessly with this app. Access plan details, track rewards, and enjoy fast refills. Stay connected with reliable coverage and 5G data options, all from one convenient place.
This utility app allows users to remotely monitor and control smart door sensors. Receive instant push notifications when a door is opened, view its current status, and set up alarm calls for immediate alerts.
Enhance your calls with custom flash screens and record conversations. Send and receive SMS globally, even to major GSM operators. Enjoy features like location sharing and PIN protection for privacy.
This app enables VoIP calls and SMS over data networks like 3G/4G and WiFi. It also offers cross-platform instant messaging and simplified calling card usage. Users need an operator code from a VoIP service provider to use its features.
