The best way is to enter the number on your mobile in international format, starting with UK country code +44 (including the plus sign), followed by the UK number, omitting the trunk prefix 0 at the beginning. For example, UK mobile number 07700 900123 becomes +44 7700 900123.
Alternately, you can dial 0044 + phone number.
(The plus sign on a telephone country code means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, and many other countries use different prefixes.)
Just dial the UK mobile number. It does not matter that the mobile is roaming in Ireland (or anywhere else); the network will automatically locate the mobile, and the roaming mobile user will pay any applicable roaming surcharges.
Just as you would call an English landline.
All Irish (Republic) mobile phone numbers start with 08 and the following digit denotes the network operator the number was originally registered with. Example 08 5(meteor network) 2993856
No you cannot, you can call another mobile phone.
mobile phone
You dial the normal number. The phone network will handling routeing the call to wherever in the world the mobile currently is.
What is a screened call in mobile phone
00 1 from a landline or +1 from a GSM mobile phone, followed by the area code and number.
If that cell phone provider is using the European standard phone system. Most do not, but I believe T-Mobile does. You'll need to ask you cell phone provider.
Enter the country code for Spain, +34, followed by the Spanish mobile number. If your mobile doesn't allow you to enter numbers in international format, substitute the 00 prefix for the plus sign.
Mobile phone is called "मोबाइल फ़ोन" (pronounced as mobile phone) in Hindi.
To call an Australian mobile phone, you dial the Australian mobile number. It does not matter if the mobile phone is physically in Australia, Honolulu, or anywhere else.