Unverified50% confidenceFactExact time
The Volla Phone was developed by Hallo Welt Systeme GmbH, a company based in Halle, Germany, and first debuted via Kickstarter in 2019.
1
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50%
Confidence
Long-term
Relevance
8/19/2026
First Seen
Sources
Volla手机能用AT&T吗？美国运营商兼容性深度解析
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