I found this article: O2 shares your mobile phone number with every website you visit
So, I thought - I wonder if any of the South African service providers do this?
Checking from the link in the article: http://lew.io/headers.php:
1) Cell C (prepaid - All-In-One R199 voucher) - No
2) Vodacom (contract): YES! The interesting headers are:
x-up-calling-line-id: 2776xxxxxxx (number obscured obviously)x-up-subscriber-cos: mobileGenericPlan,Vodacom,mobilePushEnabledPlan
This is really unacceptable, and in my opinion, a total breach of privacy.
Can anyone else confirm what they get with the other service providers?