Communications Doctrine

Earlier I posted stuff about cyphers and I think they are great but only for non time sensitive communications, Now there are plenty of different ways to communicate available to the public, but most of those are easily intercepted and even jammed.

Radio's are usually inexpensive, but range is limited and they are easily listened into, and easily jammed. Encrypted radios are available but are expensive ($1500+ ea)

Cell Phones are handy, but can easily be jammed, and tracked, as well as a log of who calls who and when.

When a small unit is engaging a force that is superior in size and funding, communications are very important. You need to prevent the enemy from communicating with each other while allowing your unit to be able to communicate.
One Idea may be to use disposable phones to communicate, perhaps with call conferencing, while ensuring that enemy communications are disrupted at the beginning of any operation.
How to disrupt communications? I have several Ideas on this but I think I will keep them to myself, suffice to say if you research the type of communications the OPFOR uses and find any weaknesses, such as single data frequency, or even a central retransmission frequency and Jam or negate that weakness then communications will be hindered.