Globul has a Prepaid SIM card for data only usage,
announced als "new". The user gets 2 Gigabytes for 9.90 BGN (
5.05 EUR). I bought one from a Globul store. The whole process including activation took five minutes. The shop assistant did the activation immediately. The SIM card works in my phone without any problem.
An ID is nessecary but neither a Bulgarian nor a home address is registrated.
The 2 Gigabytes may be used within 7 days from the time of registration.