According to the Daily Star Sunday, the model is constantly messaging male friends such as Amir Khan and Jermain Defoe, while virtually ignoring Reid.
A source said: "Alex suspected she had been texting loads of different people. But when he saw the bill there was nothing on it. Now he thinks she must have been messaging them instead. He's getting a bit paranoid about it.
"She has a blinged-up BlackBerry and BBMs everybody. There is no bill. He can see nothing of her phone activity. No photographs, nothing. The phone is her lifeline - when she goes out she is always asking people, 'Have you got a PIN? What's your BBM PIN?'
"She does not go by her real name Katie Price, she will go by the name 'Vixen', or something like that. Alex has not got a hope in hell of finding out what she's up to. He'd love to be a part of it but he feels it's another example of slowly being cut out of her life."
Price recently confirmed that her marriage to Reid is in crisis.