NTT DoCoMo Carrier From
Guam

The NTT DoCoMo Carrier From Guam is denoted by codes: 310 370. 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 Guam). The last numbers of the HNI code are equal with the MNC and this ID is given for the specific mobile network operator.

Besides NTT DoCoMo Guam has assigned country code + 1671. This number + 1671 is equal with international calling code and it’s simply the telephone dialing prefixes used for calling NTT DoCoMo numbers.
NTT DoCoMo 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 NTT DoCoMo are display in MHz units.
Another important information in NTT DoCoMo Guam archNTT DoCoMoctures is the standard of used protocols. It also uses 0 protocols such as GSM, UMTS, LTE, CDMA. The ISO standard code of NTT DoCoMo is GU. You can see more info about this mobile network operator at https://www.docomopacific.com/. How to check NTT DoCoMo coverage? How to check if your phone will work in Guam?