I.safe Mobile is a German Telephone company, That works on Android. They got a big range of phones, for zone 1, 2, 21 and 22. So there will always be a phone that fits your company

Bartec is a Explosion-proof technology, company, There headquarters in Germany, they make telephones for zone 1, 2, 21 and 22. on Atex certificate

Ecom is a innovative company what is making explosion shielded products. they make mobile phones for zone 1,2,21 and 22