Usually this problem occurs if the player hasn't completed the Cesar Vialpando mission. If you have used mods, trainers, or editors to unlock restricted areas of the map then there's a good chance that your mobile phone scripts have shut down prematurely and you won't be able to continue with this save.
If you upload your save to http://gtasnp.com and post the link here then it's a lot easier for people to figure out what really going on.
Knowing that you have a PS2 makes a difference in the kind of replies (if any) that will be made. Always let us know your tallking about PS2 (in title) when asking questions.
To be sure: There are no "Letters" on your map? Your map icons are turned on? CJ is walking around? There are no blazing markers in front of: Sweet's house, CJ's House? Cesars house? Big Smoke's House? The Donut Shop?
You've already killed the Russians? And, You've burned down the Vagoes house?
A side note: regarding the Paramedic missions. You save time by driving across country, bee line. Before you start the mission knock the doors off the passenger side and back end. As the patient starts to get in you start driving. When the patients get out at the hospital drive over them to get to the next pickup. Drive over anyone (except cops) to get to the patients and back. (I'm suprized they didn't move that topic)
Which Cheats did you use?
This post has been edited by lil weasel on Wednesday, Aug 15 2012, 05:05
I believe lil weasel edited the title himself, mods can do that as I asked a question regarding Los Desperados and lil weasel edited the title. Makes it easier for everyone to understand the problem. @Iowntheworld1994 for Sweet to call you, are you out of a vehicle? You have to be standing up/on foot. I have checked the problem out, after the mission 'House Party' wait ten seconds then the call will trigger then you have to drive to AmmuNation, on the map will be an 'S' signifying SWEET. You have the choice to get 'heated' or just drive from there to Glen Park. You know the rest obviously...as lil weasel explained, make sure you have completed 'Gray Imports' for the mission to activate. Look for the 'G' at the donut shop, if it is there then do that mission. Then the Doberman mission will activate.