About PTT4U

What is PTT4U?

PTT4U is a state-of-the-art PTT service based on ROIP technology. Relying on the GSM signal, our radios will be able to talk to each other without any range restriction. Each radio works with a SIM card (not included) and uses GSM/3G/4G and some models even work with a WiFi signal. This means that our clients don’t need to spend a fortune on expensive radio infra-structures, like repeaters, antennas, or leasing sites. All the network infra-structure is provided by the GSM carrier.

Read our FAQ section for detailed information

We are present in North America and in Europe and we ship our Radios and provide PTT service worldwide. 

In the US:
Sound of Angels
12759 NE Whitaker Way, # P888
Portland, OR 97230
Tel: +1 503 746 8282

In Europe:
Sound of Angels, Lda
Av. Jose Malhoa, 2, Office 1.1
1070-325 Lisbon

Tel: +351 96 2422996
Reg. no. PT514139625

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