Tanzania is largely covered by mobile phone networks, though not everywhere. If you’re mobile network back home offers Roaming services that could also be used.
If required, you can use a local Sim card for mobile phones which is available at a minimal cost.
For those calling into Tanzania, the country code is +255. The major city codes are as follows: Dar es salaam 22, Zanzibar 24, Arusha and Moshi 27.