To call a mobile phone that is roaming in the United States, you dial the number the same way that you would if the mobile is in its home country. The same is true no matter what country you're roaming in.
If a Nigerian mobile phone is roaming in the United States (or anywhere else in the world), you can call it by dialing the Nigerian mobile number, beginning with country code +234. Drop the trunk prefix '0' from the beginning of the Nigerian domestic number and replace it with country code +234. If a mobile from anywhere in the world besides Nigeria is roaming in the United States, you cannot reach it by dialing a Nigerian number.
If you are moving, you will most likely want to get a UK mobile number. However, if you are only going for a visit and using the international roaming ability of your mobile, then anyone who wishes to call you should dial the same number they normally would when you are at home. The network will automatically find you wherever you are roaming.
To call a mobile phone when the user is roaming internationally, dial the mobile number exactly the same way you would when the mobile user is at home.
To call from the US to an Australian mobile phone, dial 011 = international access prefix 61 = country code for Australia the Australian mobile number, omitting the leading 0 To call an Australian mobile that is roaming in the US, dial the Australian number as you normally would.
That depends. If you are calling a mobile phone with a Fresno number, from a landline in Fresno, you can dial just the 7-digit number. If the mobile phone has a different area code, you will almost always need to dial it, and in many states if the mobile phone is not a local number for you, you may need to dial the area code, even if it's the same as your own.
Depends on your Nigerian network if it allows you to call out, but bare in mind that it cost way to expensive so better use a local landlines or phone cards. Hope this helps.
How to MAKE CALLS while roamingDial *131* + country code + area code (or operator code) + phone number + # sign.Example: *131*6327301000# if calling a landline or *131*639178000000# if calling a mobile and press SEND.
When a mobile phone is roaming in another country, you dial its number exactly the same way you do when it is in its home country. The mobile network will automatically find the user, and the roaming user will pay any applicable international roaming charges.
To call this number from the US, dial the international dialing code (usually 011), followed by the country code, the area code, and then the phone number.
To make a call from the USA to Australia, dial the international dialing code (011), followed by Australia's country code (61), then the area code and phone number you wish to reach. Make sure to consider the time difference between the two countries when placing your call.
To call a number in China, you need to dial the international dialing code for China, which is 86, followed by the area code and the phone number you wish to call. Make sure you have the correct country code and area code before dialing.
If you hear a recorded message asking you to enter a Visa or Mastercard number to complete the call, that generally means that your phone was unable to get a signal from its own network and tried to roam on another network with which your provider does not have a roaming agreement.