Even before there were problems which I had to postpone the conversion by one week. I wanted my phone number porting and WinSim was not to come into contact in the location with my old provider. When at last the appointment of both sides was confirmed I stood on a weekend without a cell phone. Since the appointment much calculated on a Friday. But on the other hand the expectation it worked very well. At 00:00 clock the old card, the new card has been switched off and at 05:30 clock activated. This is a period with which one can live well. However, I must say that the Internet connection is not as good as before. I live in a rural area and it was aware that it may have an impact, but with such a big change, I did not expect. Transfer images or send voice messages not working. Either it breaks directly from or is it half an hour at the store and then aborts. I'll probably in the next few weeks to watch that I find another provider that is not too expensive and then switch back. Conclusion: Learning by doing. I would not recommend it if you are dependent on internet via mobile phone.
Supplement because of objections by the provider: The poor rating refers next to the poor power also to the poor customer service. Very difficult to reach and half the staff that I had on the phone were very unfriendly. No real help. The poor rating is because I am not satisfied with the item and the related services!