Cloud SIM is an iPhone application that allows users to have up to 4 additional phone numbers on their mobile device. With virtual numbers available from the UK, US, Canada, Poland, and France, users can make high-quality international calls to both mobiles and landlines at low cost. The app provides the flexibility to choose the connection type for calls, whether it be local access, mobile data, or WIFI, ensuring a reliable connection.

In addition to the multiple phone numbers, Cloud SIM also offers free text chat between Apple phones worldwide when using WIFI or data, allowing users to share pictures and communicate with contacts regardless of their location. The app is free to download and offers in-app purchases and a secret messaging feature.

With Cloud SIM, users can have a second phone number for various purposes such as freelancing, dating, business, online activities, and more. The app provides a convenient way to keep primary contacts private while using low-cost, roaming-free virtual numbers. It also allows for easy switching between virtual number profiles when making calls and provides dedicated voicemail for each separate mobile number.

Overall, Cloud SIM is a must-have app for iPhone users who want to have multiple phone numbers and enjoy free or cheap international calls. It offers a seamless and cost-effective solution for communication needs.