Using phones in Hungary can be confusing at first, but here are instructions how to:

If you dial a landline from another landline phone in the same area, then you do not have to use any prefixes, just dial the number. If you are calling a number with a different are code, then you have to dial the prefix 06 followed by the area code. For example to dial our office number outside Budapest you need to dial 06-1-7866658. Similarly, to call any mobile phones from a landline inside Hungary you need to dial 06 followed by the 9-digit mobile number, e.g. 06-30-3453132. To call a Hungarian mobile phone from another Hungarian mobile phone you have several options: if they share the same service provider you do not have to dial a prefix, only the 7-digit phone number. For example, from a T-mobile phone it is sufficient to dial 3453132 to reach us. From a different Hungarian service provider you have to dial 06 followed by the mobile service providers area code (at most times, but not always 30 for T-mobile, 20 for Pannon and 70 for Vodaphone) and the 7-digit number. For example 06-30-3453132.
The most certain way to reach a mobile phone from anywhere to everywhere in the world is to dial + followed by the country code, the mobile area code and the number. For example to reach us you dial +36-30-3453132 from any mobile phone inside and outside Hungary.

Landline Phone number display examples in Hungary:
+36 -1-7866658, broken into pieces: "+", "36", "1", "7866658",
06-1-7866658, broken into pieces: "06", "1", "7866658",

Mobile Phone number display examples:
30-3453132, broken into pieces: "30", "3453132"
06-30-3453132, broken into pieces: "06", "30", "3453132"
+36-30-3453132, broken into pieces: "+", "36", "30", "3453132"

Where:
"+" is the prefix to dial from GSM card holding mobile phones from anywhere in the world. Note: cellular phones or older analog or digital phone services (Verizon in the USA) may not accept the + prefix. To dial from these older phone try the "011"
prefix before the country code.
"36" is the country code for Hungary
"1" is the area code for Budapest. All other area codes in Hungary consist of two digits. E.g.: "52" for Debrecen
"7866658" is the individual phone number.
"06" is the prefix to dial a Hungarian long distance or a Hungarian mobile phone, if the call is initiated in Hungary.
"30" is the area code for T-mobile phones "20" is Pannon, "70" is Vodaphone (mobile phone service providers).