The Oi carrier from Brazil is denoted by codes: 724 30, 724 31. The followings IDs are called HNI (Home network identity). This code is created by the combination of two other Mobile Country Code (MCC) and Mobile Network Code (MNC). The first three numbers stand for the MCC and they are used in order to identify the region which the carried comes from (in the following example it’s Brazil). The last numbers of the HNI code are equal with the MNC and this ID is given for the specific mobile network operator.
Besides Oi Brazil has assigned country code + 55. This number + 55 is equal with international calling code and it’s simply the telephone dialing prefixes used for calling Oi numbers.
Oi uses 1 GSM bands, 1 UMTS bands, 1 and 0 CDMA bands.. You can read the specific frequency bands in the table below. All bands of the Oi are display in MHz units.
Another important information in Oi Brazil architectures is the standard of used protocols. It also uses 7 protocols such as GSM, UMTS, LTE, CDMA.
The ISO standard code of Oi is BR. You can see more info about this mobile network operator at http://www.oi.com.br/. How to check Oi coverage? How to check if your phone will work in Brazil? Those information will help you figure out if your device will work in the Oi roaming. Use out database and check out if your device will be locked or unlocked in Oi.
Use our CARRIER LOOKUP TOOL in order to make sure that your phone number is using Oi network.
If you'd like to find out whether your device is going to work with Oi (Brazil), please check the details below:
All you need to do is compare bands specification from your mobile network with the bands used in your device. You can check the supported bands for your phone by using out phone database.
| Name | Oi |
|---|---|
| Company | Oi Móvel S.A. |
| Country |  Brazil |
| Country ISO | BR |
| Country code | + 55 |
| Carrier website | http://www.oi.com.br/ |
| Carrier codes |
|
| Mobile prefix | xx 9 |
| Mobile prefix comment | Calling a mobile phone requires dialing geographic area codes (two digits), after that, all numbers assigned to mobile service have nine digits, starting with 9 (possible range goes from 91 to 99: 90 is not possible). f.e. +55 15 9xxxx-xxxx |
| Size of NSN | 11 |
| Number format | +55 xx 9xx xxxxx |
| Coverage map | Check Oi Coverage |
| Subscribers | 36 600 000 (June 2020) |
| GSM bands |
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| GSM protocols |
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| UMTS bands |
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| UMTS protocols |
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| LTE bands |
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| LTE protocols |
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CHECK IMEI 
