Using DialAbroad, calling Germany from UK is super simple and will cost you less too.
How to call a Germany landline from UK
For calls to landline numbers in Germany from UK, you just need to buy DialAbroad credit at www.dialabroad.com. You receive a PIN and receipt by SMS. Then, whenever you want to call any Germany landline number, you only need to dial the DialAbroad access number (enter the PIN number first time), and next enter the international calling code of Germany and the required landline phone number.
How to call a Germany mobile from UK
Likewise, it is quite straightforward to call a German mobile from UK. Firstly, you purchase credit from DialAbroad online (using any credit/debit card or PayPal). You receive the receipt and PIN by SMS. This PIN only has to be entered for your first call, thereafter you dial the access number, and won’t be requested to enter the PIN. When connected, enter the full international number to call (the international dialing code for Germany, followed by the German mobile number) and you are connected.